Customer Portal - My Requests - Search feature issues

1. Under Customer Portal - My Requests, Search does not work for Ticket number generated by Service Desk.
e.g. As a Customer, I created a new ticket and the ticket number was SDDS-100. If I try to search by that ticket number, I do not get back any results even after adjusting All / Open / Closed Requests filter.

2. Search seems to only work for any text entered in the Summary field of the ticket.

3. Another person in Customer role cannot search for my tickets (for the scenario #2 from above). This is important if another person is going to fill in for me while I'm away. We can't expect a Customer to go through 50 tickets & add substitute person as a watcher