The only way I can see that happening is if you reset on the options screen instead of using the prestige button to collect your core materials. If you had already prestiged and had them disappear let me know and I can see if I can find a weird case where that might happen.
I've gone from a 7 Derp army with 52K army power to a 7 Derp army with only 10K army power! What's with the downgrade? I've gone from being a contender on a lvl 2 map to one that is woefully inadequate. What gives?
Needs more. Can't be an ever growing game and still be a 5 minute game. Does not compute.
UI needs to be cleaned up. You don't need to occupy a lot of space for so little options. Shrink it.
Was it working before?