Default Internal order and cost center

Hi Experts,

i am uploading one file into sap and here i am giving GL accounts cost centers and WBS elements.

once i have done with upload.when i am checking in BSEG its showing one internal order and one default cost center with internal order.

i can not understand how its finding internal order and default cost cente(which diffetrent from those cost centers i have mentioned in excel).

please help me to find.

thanks,

Vani