Hi Arshiyan,
Your transformations are conrverting dates into decimals, check it why?
At transofmrations, whatever you got wrong data at cube level, bw side maintained routine and mapped source feilds of dates.
Routines are used to date fields, that may caused to get data in the form of decimals.
Check you transofmrations for
Planned delivery/Finish Date of Order, Planned Creation Date of Order, Planned Release Date of Order and Planed Start Date of Order
Thanks