Billing Location Incorrectly Set as Primary for New Event Registration / New Contact

Registering for an online Event as an anonymous user... if the event reg form includes a profile with Name and Address fields (location_type = Home) - the following happens:

• Billing location created with required Email Address - and this location is set as PRIMARY for the contact
• Home location created with the Home address info

Because "Home" is the default location type - the Billing location should NOT be made Primary location for the new contact.

You can recreate this by accessing this URL w/o logging in:
http://sandbox.devel.civicrm.org/civicrm/event/register?id=4&reset=1&action=preview

(the site is currently configured for PPal Std - not sure if that matters for this bug)

— Issue Update 4/5 rev 9177 ----

While you're looking at this... I just hit a related issue while test-driving Event Reg (event id=2) as anonymous user. I submitted "Confirm.php" - but I hadn't logged into PayPal Dev Central so got that error. I hit Back button and logged into PP Dev in a separate tab. Then tried to submit Confimr.php again. I got a fatal DB error on duplicate location type for the contact.

INSERT INTO civicrm_location (entity_table , entity_id , location_type_id , is_primary ) VALUES ('civicrm_contact' , 134 , 1 , 0 ) [nativecode=1062 ** Duplicate entry 'civicrm_contact-134-1' for key 2]

I then started over (reset=1) and filled in the same info - hoping that this time it would match on the existing contact and update (not insert) the location records. However, I got the same error. So – it seems like any returning anonymous user who puts in same email/first/last would get this error.