Can you provide the transactions ids? Could be many reasons for this, maybe the transaction was never created or it didn't propagate or it got dropped due to low fee or whatever, hard to say without knowing the ids, check on other block explorers and contact the sender again and explain that you can't find the transaction on the network.
No, no no. None of that. It was just blockr.io had some problems connecting to the blockchain, maybe their node hadn't updated or whatever. Their "most recent" block was 9 hours before I took the screenshot. Blockchain showed me my transaction just fine. Was just taking a swing at blockr and coinbase, if you know what i'm getting at.
) Hah!