Also having issues with the max unit xp and the 126.96.36.199 trainer. Not able to build buildings after I enable this particular feature. Also if I enable this feature and select a new social policy happiness take a couple k dive.
To use the increased xp feature and get past the construction of new buildings problem i have found i have to save exit to windows and restart the game, units keep their increased xp and buildings can now be built after this. A bit of a pain i know but its a work around. Unlimited movement is more of an issue but i also found that only moving the units within the allocated area and then doing it over helps too but its not 100% effective, moving them great distances seems to crash the game, so patience is a must and refer to the former work around and i use save often when i am doing this.