I've noticed that in the 'Live worker status', the coin switches to the same coin (say, Verge to Verge) and resets the timer. I don't know if that's just a visual thing or if it's affecting something on the worker. I also noticed it was switching (to the same coin, maybe to other coins) faster than ...

Payout Litecoin -0.01882676 To: <my address>
ID: 5f0b236fec73113d825f176044fedc49fab8b6e67a8e86b42b44d0600d45d68b 19/12/2017
Payout Litecoin -0.03765353 To: <my address> 19/12/2017
(No payout ID)

Current balance: -0.00336277

The first transaction was the one I was expecting, it doesn't have an ID ...