Period shows incorrectly when upload file from Micorsoft Excel via T-code:7KEX

The period sequence shows incorrectly while uploading file via T-code:7KEX.
The period sequence is changed.

For example:
period displayed in excel file as the following:
1  2 3 4 5 6 7 8 9 10 11 12

After upload, the period changed to the following:
12 11 10 9 8 7 6 5 4 3 2 1

But the correct period sequence should be 1 2 3 4 5 6 7 8 9 10 11 12.

The reason of the problem due to the file description is inconsistent.

Please delete the assignment of the file description in T-code: KP34PC
Then run the report RKCDPREO and delete the file description
(after deletion the file description is not listed in RKCDPREO anymore).
Then create the file description in T-code:KP34PC in the usual way.
Afterwards it should work.