I can confirm that confirmation can take a couple of days because most small transactions are only included by the pool itself, since those transactions don't have fees.
Also I want to note that no payment was ever lost. All transactions are issued immediately, but confirmation takes some time.
Today I'm doing some maintenance on the payment system, so payments may be paused for some time. Don't worry, it will be restarted and refilled again, all automatic payments will be issued then.