Issue with uploading multiple attachments or saving a PO with multiple attachments when creating a Purchase.

Adding a single attachment and saving a PO causes no problems.

Adding a second attachment while creating the PO causes the following:

1. Upload box does not go away after adding second attachment.
2. Second attachment does not show in the attached document list
3. Unable to save the Purchase Order when it contains more than 1 attachment.  (Must remove additional items and then save to prevent loss of work).