Download the messaging csv from the SS page and it should show you which message(s) you missed. It is possible you had a last minute message that wasn't actually due to be answered until after the badges were awarded. Etsy will not count messages on the last day or two, so as not to incorrectly penalise us for messages that are not past the required response time yet. Unfortunately, Etsy does not adjust stats after the fact, so you will probably have to live without the badge until that message drops out of calculation or you have sufficient messages to lower the impact. I wouldn't worry, the badge is not as important as Etsy would have us think. It is unlikely to make a difference.
