The pool is having some trouble sending payments because of not finding outputs to mix it with... I'm looking into this as well.
Do you have XPB in the server wallet? Just asking, since you are not charging a fee on the pool, the wallet might have insufficient funds to make payouts after tx fees.
Yes it had enough funds. It looks like it was trying to mix the dust outputs too. I'm not sure why. I changed it so that they get added to the transaction fee (and thus block reward) now so it shouldn't try to mix those anymore (amounts like 0.0091235). I thought I did anyway, sometimes it still tries... but less than before. Anybody still have pending payments?