If I upvote/downvote comments on an LW page, then close the page a few moments afterwards, sometimes my votes don't register (they're not there if I visit the same page later). If something similar happened to you that might explain why your vote seemed to disappear.
That is good to know. I suspect the probability that I closed the page shortly thereafter is only about .2 or so, but that's significantly higher than the prior I put on the LW editing staff removing downvotes, which has significantly decreased my worry.
Hiring is so hard that we spent a man-month creating a sub-startup to do it. The product is the Quixey Challenge which is running today until 7pm PST (GMT-8).
Benefits of playing: