Coins go short from time to time. The only coins guaranteed for a payout are BTC and LTC. However LTC can go short from time to time but the pool owner manually refills the LTC supply daily at least.
Ok, I can discard warning and keep mining with LTC payout ?
Yes you can, as he told me he only does that for LTC. So you don't need to worry about that =)
Idk why, but I'm using the miner now for nearly a whole week. And I never reached the daily estimated profit, it has always been way less.