Gotcha, that's kind of what I figured
I also have a set of addons that have oddities with the version numbers, so they always show up as out-of-date. For instance:
Conversation Essentials Post Rating Compatiblity is a stand-alone addon needed when using CE and PR, but it has no resource
Live Update: when I'm using RC5, the version shows 4.1.0 but it's out of date no matter what (actually, check that...it shows up to date now...?)
XenFacil's Widgets: always shows out of date because the addon shows version 2 but it's actually version 3.0.3 and the RM shows 2.0.2, that one is all messed up.
Then, any addon that has an "inbetween" release, like 1.2.4a or 1.3.5c shows out of date even though it is up to date...at least I thought it did, but the Live Update one has thrown me now.
Not sure what to do with these, except to uncheck the "Check for updates automatically" box and just keep track of these oddity addons. I'm thinking, a "comment" or "note" box for when something is unchecked. Just a thought.