No, you didn’t watch your media from your personal library.
If you have Movies & TV enabled in your settings under “Online Media Sources” (see screenshot) then results from there will show up when you do a search. Also, there is a chance of the results from “Online Media Sources” showing up in On Deck or Continue Watching (depending on how you have that set).
Every single time someone posts something like this it is because they accidentally watched the show/movie from Plex’s free On Demand library and not their own for one of the reasons I mentioned above.
Simple solution is to disable all the online media sources (technically for this case only “Movies & TV” needs to be disabled but it sounds like you wouldn’t want any of them) shown in the screenshot above (that is what I normally have but I had to enable “Movies & TV” to be able to search “Dick Van Dyke” and see if showed up in the free On Demand section (which is does, see screenshot).
-Shark2k
