Didn't they make a Highlander III, something about the planet they were all escapees from but didn't remember? Or am I just remembering 2 and thinking it's so bad it was a third?
Yes, II was the escapees atrocity. III returned to the original story, starting with an explanation with Christopher Lambert staring into the camera and, in so many words, saying “let’s pick up a few minutes before the first movie ended and ignore that POS that was its sequel”, then continued with a storyline of “oh, hey, there is one more immortal after all...”
II was so bad that, yes, you are mis-remembering it.
They made a 3rd, and several others, that basically pretended the 2nd did not happen. Sean Connery was in it because his contract from the first movie required it. I read somewhere he does not think it is funny to ask him about it.
There was also a 90s tv series that was not that bad.
I heard that III was actually watchable, but I was so soured on the series by II that I skipped it.