Modified By and Date stamp

I have a sheet that is actually owned by a co-worker, I am an admin on the sheet. I went in to review the sheet, made no changes to any line but now it show I have modified each line of the sheet, at 12:14 pm on today's date. Obviously, I could not have modified all these lines at the same time and I made no modification to any line. This concerns me, because we need to be able to trust this information.

Is there something weird going on with this function?


Heather Turley