Great quiz! Surprisingly difficult. Got 36. Had the most trouble with the deep south because of a lot of repeated county names and the northeast because there are fewer counties per state.
Creative idea. I love US county quizzes and this is a unique take on the concept. I got 36 as well, but if I try it a few more times, I'm sure I can get closer to 50.
Yes, the names are unique in the sense that there is Leflore County, Mississippi, and Le Flore County, Oklahoma. Jetpunk does not register or account for either capitalization or the space character, so there is nothing I can do here aside from just removing them and considering them not to be unique. However, I think that would be wrong given that they are clearly distinct.