It is not impossible for God to fall from being God... there are a number of scenarios where "God would cease to be God"
Alma 42:25
25 What, do ye suppose that mercy can rob justice? I say unto you, Nay; not one whit. If so, God would cease to be God.
Sorry, I don't do "standard form"
I think any contradiction comes from a misunderstanding of what "create" entails.
http://www.ancient-hebrew.org/5_creator.html
Child Root (Branches of the Tree)
Pronunciation: "Qa-NeH"
Meaning: To build a nest.
Comments: This child root is a nest builder, one who builds a nest such as a bird. Also God as in Bereshiyt (Genesis) 14.19; "
God most high creator (qaneh) of sky and earth".
The English word "create" is an abstract word and a foreign concept to the Hebrews. While we see God as one who makes something from nothing (create), the Hebrews saw God like a bird who goes about acquiring and gathering materials to build a nest (qen), the sky and earth. The Hebrews saw man as the children (eggs) that God built the nest for.
In other words, God is cleaning up a mess He did not create, and He is doing it without taking away our free will.
What does adopt mean? Adopt means to take care of someone you did not create...
Romans 8:15
15 For ye have not received the spirit of bondage again to fear; but ye have received the Spirit of adoption, whereby we cry, Abba, Father.
God is not the only eternal entity, He did not create everything, He did not create evil. "Create" is better translated as "transform" or "organize".
Those who believe in ex-Nihlo creationism are the ones who have trouble reconciling evil with the existence of God.