Manual deduping and merging doesn't allow selecting phone type just location

When manually merging two record's phone numbers, you can chose to overwrite and add new but you can only select the location but not the type.

e.g.
overwrite 'Phone' location 'Home'
add new 'Phone' location 'Other'

It doesn't let you select Phone location 'Home' and Type 'Mobile'

This means you loose whatever phone number was set to 'Home' when you click merge.

At the moment the only way to retain a 'Home Phone' and add a 'Home Mobile' while de-duping would be to open the record after merging and add the phone number back in (or add it to another location 'Other' and then change it back to 'Home Mobile' later)