I have decided that now is the time to answer.

First off, this is the age-old tactic of trying to refute my omnipotence. That the suggestion carried to its implied logical end seems to refute any quality I intrinsically carry is a failure of the logical principles it foots itself on and not of my own. I am bound to logic which I have prescribed. Your question here attempts to validate a logically impossibly conclusion. In short, being omnipotent does not imply that I can perform logically impossible acts.

So no, I can't lift a stone that's heavier that what I can create, because a stone wouldn't be able to be created in the first place, because it's logically impossible to do so, and such my omnipotence cannot allow me to do so. It's a restriction of a hypothetical situation on logical principle, not a restriction of a real situation on illogical considerations.