Admin star labels always default to 5 text boxes

To Reproduce:
On the admin side for a content type
Choose 7 stars. There will be 7 label text boxes (8 w/ cancel)
2 extra will appear dynamically.
Save content type.
Re-edit the content type, and there's only 5 boxes showing, and there should be 7.

Same thing happens with stars less than 5 (i.e. when 4 stars are chosen, then it'll still display text boxes for 5 stars instead of for the 4 star labels)