Spare days creeping in?

[MENAGERIE]

Hi thanks for a great bit of kit (CHS also)
in PBOL, I set up a bar for my age, but a couple of weeks appears to have been added (see image). I cannot figure out why this is happening... what am I missing?

[mouser]

Yeah I'm afraid that when calculating the days between two dates that span many years, PBOL doesn't do a very precise job... I need to look into why it's so far off though.