For some reason, the history of a tag wiki with a suggested edit approved with improvements from the reviewer may be listed out of order:
This can prove confusing when the edit history is reviewed. Is this normal?
This happens with questions as well: in this question, revision 3 appears before revision 2, and after posting the improvement, the rendered HTML for the question was that of the suggested edit, not that of the improvement. Furthermore, an edit by the improver in the 5-minute grace window was counted as a separate edit (which showed up in the right order).