Prints multiple scores on top of each other

When printing parts from scores, it seems to be pulling parts from various scores and prints them all on one page. For example, I created a score for Take Me Home with a piano part, two violin parts, a viola part and a cello part. Then wrote the harmonies for the second violin and tried to print just that part. It pulled the score for Danny Boy (which wasn't even open) and a score from Scarborough Fair (not open either) and printed the part for 2nd violin on top of both of those! I updated my program, restarted my computer, reopened the program and the score for Take Me Home, clicked on the Violin II part and clicked print from the drop-down in file. Same result. So I exited the program, shut down the computer and left it off for two hours. Then rebooted, restarted Musescore, opened the Take Me Home score, clicked on the violin II part and clicked print again... same result; scores from other works printed on top of the violin II part making it illegible.