Вы путаете периоды, культ Амона-Ра появился значительно позднее культа Гора, так что никаких противоречий тут нет.
И не нужно давать ссылки на усеченную русскую статью с википедии когда английский варриант более полон:
Horus is one of the most ancient deities of the Ancient Egyptian religion, who appears in his earliest form in late Predynastic Egypt. Represented as a falcon, his name is believed to mean 'the high' or 'the far off' and his earliest connections are to the sky and kingship, derived from being the son of Hathor or Nut, as a sun god. Because the cult of Horus survived for the whole of the Ancient Egyptian civilization that extended for thousands of years, he gained many forms and associations.
Horus was usually represented as a man with a falcon's head. One important association is the Eye of Horus which was an Egyptian symbol of power (first identified with Wadjet and seen on images of his mother, Hathor, as she was emerging from the reeds) and of the offerings made to the god Osiris and by extension, to all of the dead. In one myth cycle Horus' left eye is injured during his struggle with his uncle Set, who had murdered Osiris in an attempt to seize the Egyptian throne. The Eye of Horus, its injury, and subsequent restoration became an important symbol for the unified land of Egypt and in the funerary rites of the renewal after death.
Since Horus was said to be the sky, it was natural that he soon was considered also to contain the sun and moon. It became said that the sun was one of his eyes and the moon the other, and that they traversed the sky when he, a falcon, flew across it. Thus he became known as Harmerty - Horus of two eyes. Later, the reason that the moon was not so bright as the sun was explained by a new tale, known as the contestings of Horus and Set, originating as a metaphor for the conquest of Upper Egypt by Lower Egypt in about 3000 B.C. In this tale, it was said that Set, the patron of Upper Egypt, and Horus, the patron of Lower Egypt, had battled for Egypt brutally, with neither side victorious, until eventually the deities sided with Horus.
A painting of the god Ra-Horakhty wearing the symbol for Wadjet, the cobra sun deity, as a crown - typically the symbol remains, but the names of the deities performing the function change as new cults arise
As Horus was the ultimate victor he became known as Harsiesis, Heru-ur or Har-Wer (ḥr.w wr 'Horus the Great'), but more usually translated as Horus the Elder. In the struggle Set had lost a testicle, explaining why the desert, which Set represented, is infertile. Horus' left eye also had been gouged out, which explained why the moon, which it represented, was so weak compared to the sun. It also was said that during a new-moon, Horus had become blinded and was titled Mekhenty-er-irty (mḫnty r ỉr.ty 'He who has no eyes'), while when the moon became visible again, he was re-titled Khenty-er-irty (ḫnty r ỉr.ty 'He who has eyes'). While blind, it was considered that Horus was quite dangerous, sometimes attacking his friends after mistaking them for enemies.r
Ultimately, as another sun god, Horus became identified with Ra as Ra-Herakhty literally Ra, who is Horus of the two horizons. However, this identification proved to be awkward, for it made Ra the son of Hathor, and therefore a created being rather than the creator. And, even worse, it made Ra into Horus, who was the son of Ra, i.e. it made Ra his own son and father, in a standard sexually-reproductive manner, an idea that would not be considered comprehensible to the Egyptians until the Hellenic era. Consequently Ra and Horus never completely merged into a single falcon-headed sun god. (обратить внимание на этот параграф!)
Nevertheless the idea of making the identification persisted as with most of the symbols used in ancient Egyptian religion, and Ra continued to be depicted as falcon-headed. Likewise, as Ra-Herakhty, in an allusion to the Ogdoad creation myth, Horus was occasionally shown in art as a naked boy with a finger in his mouth sitting on a lotus with his mother, Hathor. In the form of a youth, Horus was referred to as Neferhor. This is also spelled Nefer Hor, Nephoros or Nopheros meaning 'The Good Horus'.
In an attempt to resolve the conflict in the myths, Ra-Herakhty was occasionally said to be married to Iusaaset, which was said to be his shadow, having previously been Atum's shadow, before Atum was identified as Ra, in the form Atum-Ra, and thus of Ra-Herakhty when Ra was also identified as a form of Horus. In much earlier myths Iusaaset, meaning: (the) great (one who) comes forth, was seen as the mother and grandmother of all of the deities. In the version of the Ogdoad creation myth used by the Thoth cult, Thoth created Ra-Herakhty, via an egg, and so was said to be the father of Neferhor.
Isis had Osiris' body returned to Egypt after his death; Set had retrieved the body of Osiris and dismembered it into 14 pieces which she scattered all over Egypt. Thus Isis went out to search for each piece which she then buried. This is why there are many tombs to Osiris. The only part she did not find in her search was the genitals of Osiris which were thrown into a river by Set. She fashioned a substitute penis after seeing the condition it was in once she had found it and proceeded to have intercourse with the dead Osiris which resulted in the conception of Horus the child.
Conqueror of Set
By the Nineteenth dynasty, the previous brief enmity between Set and Horus, in which Horus had ripped off one of Set's testicles, was revitalised as a separate tale. According to Papyrus Chester-Beatty I, Set was considered to have been homosexual and is depicted as trying to prove his dominance by seducing Horus and then having intercourse with him. However, Horus places his hand between his thighs and catches Set's semen, then subsequently throws it in the river, so that he may not be said to have been inseminated by Set. Horus then deliberately spreads his own semen on some lettuce, which was Set's favorite food (the Egyptians thought that lettuce was phallic). After Set has eaten the lettuce, they go to the deities to try to settle the argument over the rule of Egypt. The deities first listen to Set's claim of dominance over Horus, and call his semen forth, but it answers from the river, invalidating his claim. Then, the deities listen to Horus' claim of having dominated Set, and call his semen forth, and it answers from inside Set. In consequence, Horus is declared the ruler of Egypt.
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Я видел бога он имел форму светящегося гриба...
Я слышу крики грешников сгорающих в огне...
Восславим очистительное пламя братья...
Поклонимся бомбе!!!
Никакой войны — кроме классовой!