Long time reader, first time poster here.
I tried to search around to see if anyone had a similar issue, but I could not find any that matched fully. But apologies if the answer is right in front of my nose somewhere.
Before I went to bed last night I got my total time to 2992.xx seconds. Then when I logged on today it was at 3021.12 seconds.. Im 100% sure that the time did jump as I was aiming to get under 3k seconds prior to going to bed.