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Uploading another file in Multi-Upload field through edit link overrides the existing onesAsked by nmhg on January 20, 2015 at 09:52 AM2. opened the same file a second time and uploaded the attachment with no concern. However, when I opened the file the original attachments were not visible (I did not notice) so when I saved the 1 document it deleted the other 3 that were there previously.
I have now forwarded this thread to our developers so they can check further. If there are updates, you should know it via this thread. Thank you for reporting.
I've just made some fixes on multi-upload elements which should also fix this problem. Please let us know if the problem persists.