U print.com

Has anyone used this website for there invitations, programs ect.....???
I was making my programs and I saved it
I copied the link as the directions said. Later the same day I went back and did more work....saved, Copied the link
NOW ALL OF MY WORK IS GONE!!!!!!!!!!!!!!!!!
It takes me right back from the beginning???
Did anyone else have this problem
This site is ridicules and is getting me TICKED OFF