Well, if he can "actualize every affair," then he should be able to make that situation possible, or he is not really omnipotent. Unless we consider what we stated earlier, and he can do it, but chooses to wave away his omnipotence.
Actually, that is just stating a fact. See above.
I don't think you understand the concept of acutalizeing every affair. I mean just look at the question you are asking if God can create a 4 sided triangle which is not possible. Because by def. a triangle has 3 sides, and who decided that def? God ofc.
To conclude, God can create stone that is heavier than anything we can imagine, but He will always be able to move the stone, what must be understood is that failure is not an aspect of omnipotence.
*NOTE*
The last statement with the one about God limiting his power was a curve ball in order to bring in a new statement. *NOTE*