Spirirt keep is currently only giving me lesser spirit potions  on any stage i run, i have run 30 Spirit keeps on stages 5-8 and only drops lesser potions. 

Edit

(  all the keep atm are only giving 1-2 lesser potions now, no matter what stage im on ive used 400 energy across a couple of days to try and get results and all of the keeps that ive tested give only lesser potions on any stage???)