GoFlex Desk system cannot delete files or move to trash

I purchased a GoFlex Desk for Mac with the FW800 adapter. No issues with stability or performance.

The only thing that is weird is related to deletion of files:

1) When I set a program to auto-clean files (for example, deleting source rar files after unpacking) it doesn't work

2) Whenever I try to delete a file, I get a warning that "This cannot be undone", and it's doing a permanent delete rather than moving it to trash.

Any ideas why this is happening? I've verified that I'm not using any Seagate drivers, and the drive shows up as the "Orange" generic external drive.