IOW, you've discovered something else God cannot do, and he's therefore still not omnipotent. Besides, Him changing His actions is hardly the same as Him changing His substance, or the lack thereof. Additionally, I am reminded by others that God appears to have changed His mind about the people of Noah, and in His dealings with Sodom and Gommorah - how do you account for that, then?
His changing His actions would be a change (or motion). Since God is pure act he cannot necessarily change (or be moved) in a logical sense.
You don't seem to understand that what is impossible in a logical sense (i.e. a "square circle") is simply nonsense and meaningless, evidence of nothing.
Again, this so-called "deficiency" is really a perfection and an example of His immeasurable, limitless power.
Additionally, I am reminded by others that God appears to have changed His mind about the people of Noah, and in His dealings with Sodom and Gommorah - how do you account for that, then?
Quite simply. The account given in the Bible is an historical account by a primitive nomadic people. They describe God's actions as they see them. They tend to anthropomorphize God, just as you do when you speak of Him "changing His mind."
God created Lot and sustained Lot in his being. God gave Lot the power to "bargain" with him. From all eternity the beginning, middle and end of His "negotiations" with Lot were present to Him, as are all events, since He is outside time (eternal).
Of course, the biblical writers were neither systematic theologians nor philosophers and simply recounted events as they were witnessed or passed on to them.