Behavior of attachments

[Jon Polish]

The following behavior has existed for as long as I have used UR, but I have not questioned it before.

1. I have some stored files in the explorer pane.

2. If I drag any of these stored files to the desktop or a folder, the file is copied to the destination and remains in UR

3. If I drag the file from UR to a new message in my email program (The Bat), the file shows up as an attachment, but is deleted from UR. The same thing happens when dragging to word processing documents, spreadsheets, etc.

Why should this happen? This behavior seems inconsistent to me.

Thank you.

Jon