Ah, yeah, it's 70/70 with two empty slots at the end. Clicking on the empty spots doesn't seem to do anything.
Have you never seen those Pokémon before? Like, you didn’t obtain them and they later disappeared?
It seems like a weird bug, no one has reported anything like this. Until I know how it happens, I can’t fix it, but if you download your save .txt and send it to me via Twitter or Discord, I can manually add the Pokémon you’re missing.