Playtime DECREASES after server restart

This is a weird issue. I was testing something else and noticed this. I haven't noticed this in Factions (and I don't play RPG much) so this might be SMP specific. Before restart, my playtime was 124h38m (took a screenshot) After restart, my playtime was 124h22m (plus or minus 1 min) There are two possibilites i can think of 1. Playtime is not saved correctly on server restart. Playtime within a certain number of minutes/hours of the restart is not saved. This was my first thought, though I'm leaning more towards the next option 2. There is a discrepancy between displayed playtime and saved playtime. My best guess is that "active" vs "afk" may be counted differently. For example, maybe "actual" playtime considers a player AFK after 2 mins of inactivity, while "displayed" playtime considers a player AFK after 5 minutes.