period calender isbt showing predicted period dates???

V-Lin

Shouldn't my <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">period tracker</a> calendar shows when my next predicted period is going to be?? it isn't doing that, it's only showing my fertile dates... is there some way I can fix that?

update: now my fertile dates have been removed from my calendar as well...??