I looked at your project and found that it is, for some reason, placing an asterisk in Column F each time you hide the rows.

First it was row 31, I manually deleted that asterisk - hid the rows - then the asterisk moved to the next lowest blank cell with a checkbox. After doing this several times, it worked down to row F35 creating an asterisk where an asterisk not previously present .

As I indicated, I don't understand how it is doing that. Time for a Forum Guru to step in. Hope this information helps them.

All the best !