Edit Individual contact: changing location type on existing email or phone results in duplicate email / phone records AND delete doesn't work

1. Changing location type on email or phone while editing Individual contact results in duplicate entries.
2. You can't remove additional entries either. Clicking 'delete' link hides the row (in the Edit form), but after Save the phone or email you tried to delete is still present.

Please check the other similar objects in this interface for the same bugs (IM, Website, Open ID).

— original post —
Morning.

Have discovered a lovely little bug this morning and i have repeated it on the demo forum on the individual demo@example.com

When editing an individual (i dont know if this also applies to other contacts) and i change the email type and click "save" it actually duplicates the email so there are two identical addresses but with different types.

Also when then going back to edit the same profile, I can "delete" the extra email, but when clicking save, it doesnt save this.

Do le me know if I need to be clearer.

Thank