seems you use old version. calling a few listeners for one upload component was already fixed. Please use at list 3.2.2 GA
You won't get three file upload working on one page at the same time.
HTTP or server usually allow only two requests from one client at the same time.
So, 1st request - file uploading, 2nd - getting progress info by AJAX requests.
So you see there is only one file upload can work on the page properly. (at the same time)
I'll update and try a new approach then