Edit of node adds blank field

Issue Summary

With number of values set to unlimited, each time the node is edited and saved without changing any of the phone fields, a new blank phone field is created. So if you start with 2 values for phone entered, and then edit the node for some other reason, you'll end up with three values for phone (the third one blank). Edit the node and save again, you'll have 4 values (two blank), etc.