That does sound like some sort of a graphical bug!
Does the stats page not reflect any of the stat bonuses that you receive from moves?
Here's an example of a working stats screen showing the bonuses from an equipped move:
View attachment 379
You'll see that Cripple Resist, Crit Resist, and ATK are all being increased.
If you don't see this, we can move this one over to the bug reports section and investigate further.