I'm starting to wonder myself as I was getting less on updamoon but not half the amount but I have tried one of their other coin pools today and split my mining between that and another smaller pool with the same coin and have mined a lot less on their pool. Around half the amount, just adding up quickly in my head.
Be aware that the first hours your earnings will be less due to PPLNS kicking in slowly, you need to be mining for a while or use a pool that has straight payment per share (which is uncommon) but I don't know such pool for BEE.