I wrote something about the voting process here
https://bitsharestalk.org/index.php?topic=2193.0 , this may also help to understand your questions.
Chainbrowser only shows incomings for an address.
mmcvotes only shows votes for MVTEcXo style addresses.
About your setup:
When you imported the MAXPWR address and sent something there it was on that address. After you sent a satoshi to MAXceo the client probably moved your balance to the address that was created with the wallet (if you had sent the satoshi to a MVTE address, the vote would be counted from that address).
So the Satoshi you sent to MAXcmo probably was sent from the wallet address, not MAXPWR.
That's kind of a guess now, but the way I understand the client to work. To be sure you should check the transactions on chainbrowser.
About your missing votes: if you're curious, check the vote transactions and the involved addresses. if you just wanna fix it, follow the posting in the linked thread