Conter Log calculations

Hi, I wonder if there is a bug or delay or something in calculating the values with Conter Log. Why is ¨This month count'' showing 140,7 when ''Previous Month count'' and ''Total Value'' is 161,7 and 17,7?

161,7 - 17,7 = 144, not 140,7

If I use the last value in the Log which is 160,8 or the value at 23:00 it doesn't make sense either. 

Or am i missing something here?