Hindus Must Read This?

Lord Vishnu cursed by Durvasamuni to create 10Avatars in Earth then Vishnu convinced him to grant those Avatars for LokhaKalyana(Welfare of the World and Weal). but later Lord Vishnu cursed his Gate keepers called Jaya and Vijaya to create 7 Avataras as Demons(Monsters) in Earth. Later Vishu killed them(Hiranya Kashipu as Ugra Narasimha, Kamsa as Krishna, Kartavirya as Parashurama, Ravana as Rama, Vamana as Bali Chakravarthi and so on) in his 9 Avatars.... then he got rid of 9 avataras... now what my question is that... all these hypocrisy games are played by vishnu is right? if it is not... can u tell me y? but remember, all those demons(Jaya and Vijaya) troubled humans