When selecting a Contact at the time of creating an invoice:

1)

Add a visual indicator what type of phone/email is selected (i.e mobile, fax, home, work)

and

2)

Add a visual indicator—such as a dropdown picker for each field (phone/email), only if multiple are available—so I know there are other options to choose from. Else, I have to check every time to see if there are any alternate contact methods, usually finding there aren't.

Ticket#4466985 has a video, but I don't want to display it here because it's live data.