I can relate with that. the other day I saw a post that mentioned some emacs keybinding and I went "oh, nice, I didn't know about this one, I'll make a note so I don't forget." then, not long afterwards, I realized I not only knew it, but used it very often. I just didn't connect the name to the person, so to speak ;-)
the description in the post didn't quite match my mental model, too, but once I realized the keybinding was something I used often, the description and my mental model collapsed into one. it was funny to witness that mental process from inside ;-)