Problem with uploading latest version

Hi,

I have a problem, I'm not sure if this is a bug or perhaps Im doin it the wrong way.
Anyway, I created a test spreadsheet at Zoho Sheet, and saved it there. I uploaded
that sheet to Zoho Projects, uploading of new file is OK, no problem since there's an option
to select where the source file is located (local harddrive, zoho docs, google docs)

BUT the problem is, when i try to upload a NEW VERSION of that spreadsheet, there's no "zoho docs" or "google docs"
selection to choose from. it only shows the "select file" (which will of course extract file from my harddrive).

see attached captured image.

JoN