I used to see Resoln spike to 50,000 mana in the earlier beta's, destroying the historical graph and making every other player look like they never had any mana during the game.  They didn't use ( how could you burn through 50,000 mana without an army of spellcasters?) it all, and it eventually went back to near zero after 2-3 years.  Maybe the problems are related?

This normally happens when you are moving an unit out of a city, but when selecting a destination square where to eject it from the city, you choose a square that itself still is a part of that city. I sometimes make this mistake because a tile looks like it isn't a part of a city because the improvement on it is still building, making it visually seem the tile is empty.

What I am describing happens no matter where I choose the unit to go, I usually am selecting the unit to go a long ways away, and instead they go chasing after their previous commander.  So if the commander is in the city they were also in, they turn around and go back into the city, if the commander champ is in the opposite direction of where I am telling the unit to go, they will run down the road toward their old leader.