That was a totally seperate payment, not for a mining package. That 0.25 was from Mining United in response to a forum post. https://bitcointalk.org/index.php?topic=189872.20 Post #26. This was when he was questioned about gambling on Satoshidice. Ok, the reason for that payment checks outs and the times do match up.
Again, not really. There are some small transfers in my wallet. For a while I was doing the bitcoin faucets, and I did receive another bonus on 5-11-13 from Mining United for another forum post, https://bitcointalk.org/index.php?topic=201778.msg2106728#msg2106728 Post # 4. Payment was 0.0125, and also paid for a Mining United Premium Membership, 0.3 bitcoins on 5-11-13. Made a sale on Bitcointalk forum, 0.4 bitcoins on 5-18-13, and finally spent 0.32403 on Bitmit on 5-18-13. Those payments are irrelevant to what MiningUnited would owe you.
Actually, I never got paid for 4 packages. A 0.25 on 5-8-13, a 0.05 on 5-8-13, a 0.05 on 5-11-13, and a 0.05 on 5-12-13. Why I got a full 1 BTC, I don't know.
As you said the last official payment for service was at
2013-05-04 16:03:55. Here's the list of payment you've made from the address,
1PSnLUwMqAa6qXb9XkMcFekAsntJbHwNNx. As you can see, that next service you bought was paid for at 2013-05-08 03:55:47 for 0.25 BTC, then 2013-05-08 03:57:02 for 0.05 BTC, the only other possible payments you could have made to MiningUnited were the 2 for 0.05 BTC to address
1Q8wC2Z2CkqMB6h9LwXVnKpnsWv9G3DiX8. By using your payment address and checking your position in
MiningUnited's queue, we can see that your orders number were 2730 for 0.25, 2734 for 0.5. That's the 2 known unpaid orders. The next orders are 3114 and 3135. If we check the address of order 3134, which is 1NZkyjA8qhsxAPRegZCNCJYrUkJHYenHfe, then there should be a 0.05 payment to 1Q8wC2Z2CkqMB6h9LwXVnKpnsWv9G3DiX8 just before your last one at 2013-05-12 13:51:15. There was no such payment.
Even if there was such a payment, that would mean that you had 0.4 BTC in orders not yet paid out. So, why would you get 1 BTC?
The facts speak for themselves.