Is this something new? Was it working fine then suddenly started doing this?
Has anything changed on your computer? Did the operating system update? Any new software installed that may be scanning the flash drive?
Windows cannot tell that the flash drive associated with the quadstick is related to a mouse over the same connection.
The other thing you can try is putting the quadstick into a USB mode that does not have a flash drive exposed. Update the firmware to 2365 to do this and run
a no-flash mouse configuration.
Do NOT make that your default.csv.