Shared address as a non main address doesn't work, and lead to lost and corrupted information

Step to reproduce:

Create an individual contact,

add an address

On the first Address, share the address with an household Andrew Smith's home and set it as non primary address

On the second address, put a work address, any content:
1234
dffd
test, AE test
United States

http://drupal.demo.civicrm.org/civicrm/contact/view?reset=1&cid=159
the main address (work address) contains household address
Household Address:

When you edit it, that's the main address that is shared, the secondary address contains the shared address, the 1234 test address I put is gone (well, displayed, but not modifiable as the household address)

If you save, it goes downhill, the 1234 address is ereased