I have a similar problem.

I sent 5 payments to the same address about 24 hours ago.
2 payments received at least 1 confirmation within 30minutes.
The 3 other payments have yet to  a single confirmation.

Is this normal? If I receive no confirmation in another 24 hours, what should I do??
(The two confirmed payments have over 150 confirmations now, but the 3 payments still have 0 confirmation)

Thanks in advance.