For what it's worth, Molly tends to push updates as beta first (pre-release on Github), before transitioning them over to stable (release on Github) a little while after, once it's been tested. I'm 99.9% sure they aren't going to be immediately pushing each new version to accrescent as soon as they are available in pre-release, because the default behavior when you install with the apk directly is to only check for and install stable versions, and accrescent doesn't have the option for separate stable and beta update tracks.
The previous stable for Molly was from February 7th, last week 8.2.2 was published as beta and it wasn't moved over to stable until two more revisions over the course of the week. The latest one sat in pre-release for a day or two before being marked as stable.
So in the future, if you see that the Github has several newer versions that aren't on Accrescent yet, if the new versions on Github are all marked as Pre-release, that's probably why.