We've disabled the halving of payments for now, perhaps that will at least make the payments for non-BTC coins stable
Thanks. So far I have mined NOTE, VIA, PTC, DGB, DGC, MZC, MYR and DASH. Only had the transaction halving issue on NOTE and VIA. Big pending balance on PTC whilst the pool mines enough of it to pay. The delayed payment (transactions without txId) might be occurring whilst the system is waiting for transactions to confirm (had that quite a lot attempting to mine DASH). Had a small 0.45 DGB transaction that didn't get a txId when other payments where going through. Not sure what happened to that. It seems that mining coins that are regularly mined across multiple algos' works quite well on the whole. Then I can send them to exchange for another coin without incurring high BTC transaction charges.
I hope you manage to get to the bottom of the issue, I find mining DGB payments is good coin for sending to exchanges quickly.
In the meantime, the system seems to be indicating that I am around 4 NOTE and 10 VIA down.