How does the bounty system work?
I started a bounty on this question but I could not set it to 50 rep - only to 100.
I understand from the FAQ that it is possible to start a bounty for 50 rep (I'm cheap - what can I say?)
My questions are
Why wasn't I able to choose 50 rep for the bounty? (I could only choose 100 or more)
Is there a way to correct the bounty to 50 now that it is already "in the open"?
The question I put a bounty for is only two days old and apparently this is the first bounty offered for it (to the best of my limited knowledge).