Простой, но какие-то глюки в подсчете

Английский - не проблема, но какие-то непонятные суммы ежедневно прибавляются при отсутствии трат. Только у меня такое?
How come there are some extra expenses in every new day in the Left (the more days - the more expenses which have not been made)? I.e. on the second day Ive got 23,33 extra added to my "spent" automatically. On the 3rd day it was about 90, on the 4th day I havent spent anything but got left -468, etc.

Merrycurly about BUDGT - Daily Finance, v3.1