Completed Puzzles are showing as incomplete

My score for the app keeps dropping as more and more puzzles that I have already completed are dropping off. I was at Level 9 with over 1800 points and near the end of Intro to Interviewing when my score dropped down to 1600’s and level 8. Now today, my score is in the 1300’s and I am at level 7 because a bunch of the puzzles in the Fundamentals course, which I already have completed have dropped off. Also, I had to do over a few already completed puzzles in the Intro to Interviewing course. However, there is one that will not stay completed - Shape Up - that I have redone 4 times. I sent a bug report for that one but have not heard anything so I am trying this avenue. I just want the app to accurately reflect what I have already completed - thank you!