I have sent a message directly to the team. https://www.wikitree.com/wiki/Special:BrowseMatches shows pages of merges that have already been completed. I thought it had to do with the closed account approval issue, but, it looks like it is more than that.
Thanks, we will look into it.
There is also the problem noted by Marion above - in some cases the merge has apparently "disappeared" from the profile history (see Badenhorst-1104 which redirects into Badenhorst-1103 yet there is no trace of a merge in the Changes tab for Badenhorst-1103).
Evidence of the merge here: