[tag:OWA] and [tag:Outlook-Web-Access] overlap a bit. Should we merge them?

Bumping this again, as I just encountered both a [tag:OWA] and [tag:Outlook-Web-Access] wiki edit review with nearly identical content.  Do tag merges not retroactively merge tags? Or do tags and tag wikis persist post-tag-merge?

Question in question is here: https://serverfault.com/questions/469662/exchange-2010-emc-and-owa-non-functional-after-unexpected-server-reboot