Try clearing the cache, just Cache, NOT DATA!!! It’s some sort of glitch. Make sure your account is backed up by Google or Facebook (for safety reasons)
This has happened to me before as well. I just restarted the game and everything turned out fine.
Hahahahahahha unlucky kid
It’s actually a visual glitch, it happened to me before if you notice it’s exactly 200 dna missing which is what it takes to level the mono from 13-14. So what’s happened is you’ve levelled it up from 13 to 14 the dna hasn’t gone down and when you’ve reset it fixed itself.