Mormon religion. Is it possible this denomination is changing?

We have not changed we still believe what Joseph Smith started teaching in 1830, the reason your LDS friends have not heard of the beliefs you outlined is because they aren't things that we have ever believed but If you'd like to know the origin of some of them:

The bible teaches that we are children of God and that we can be joint heirs of Christ. The bible also teaches that Christ inherited all things that his father hath. From biblical teachings we can therefore say that. Jesus is like his Father, and that we can become like Jesus. Now if I were an Antimormon who wanted to scare people I would reword this and say "Oh my Gosh, those cultist's believe that they will become gods of their own planets" which would be a silly and inappropriate way to express a Christian ideal.

The idea that Adam is God comes from phrase in a sermon that was taken out of context for antimormon purposes, you probably have the reference so I won't bother finding it for you. If you were to read the sermon you would find that what was taught was that: just as we respect our fathers and turn to them for spiritual guidance we turn to our grandfathers and so we will also turn to our father Adam. We do not worship Adam that would be sacrilegious especially since Joseph Smith taught us that Adam worshiped the Father in the name of Christ like every other prophet who has ever lived.

Our religion has not changed but like the things that Christ taught while on the earth they have be occasionally misinterpreted by wicked men for wicked purposes. I frankly would be concerned about any Christian church that didn't have mud thrown at it on occasion.

It has already changed in a number of respects, and will probably continue to do so. But none of that affects its fundamental silliness.