differences in Pricelists

Hello to all!

i have realised that a specific date changes in pricelists have happened. by trying to find these differences through change log i can see with blue color the changes happened by the user admin that i use

i have not done anything for sure thwese days.

is there any way to dfind out how it happened and from which user?

what has done to [pricelists is roundings...for example an itemcode that has price 15.43 after the rounding the new price in pricelist is 15