Hello Wayne,
Thank you for your question about number of snipes. We have advertised for over a decade that we offer as many snipes as you want within a constraint of 5 at a time. We recently removed the "5" so we could experiment with offering more. Our competitors have a limit of 4 per month, so our goal is to allow ten times this number.
As for changing the bid value, it looks like you found a bug where you can't change the bid value if you are at your limit. In that case, you can delete the snipe and add it again. I'm surprised no one reported this previously, but in any case, we will prioritize the fix for this weekend.
Thank you for taking the time to write in.
bidslammer