Minor bug, but I thought I'd report it all the same -- whenever you go to the moderator primary page, the page doesn't remember who you voted for.
You can perform another up/down vote, but this second vote isn't counted.
e.g., I vote for Tzenes, giving him 1 up vote. Several hours later, I come back, and click on the moderator primary thread again. Tzenes has 1 up vote (from me), but I can up vote him again (which appears to bring him up to 2 votes). If I refresh the page, Tzenes still has 1 vote, and once again I can 'vote' again.
Again, minor, but inconsistent with the rest of the stack exchange sites.