Well, you can get one of them via Additional Traits feat, and retrain it for another Additional Traits, with the second trait. This way you can't have both at the same time, but over the course of your career.
not true. Additional Traits (grants 2 more Traits), still limits to one Trait from each category of Traits (Combat, Faith, Magic, Social, Campaign, Race, Regional, Religion):
You have more traits than normal.
Benefit: You gain two character traits of your choice (see Chapter 8). These traits must be chosen from different lists, and cannot be chosen from lists from which you have already selected a character trait. You must meet any additional qualifications for the character traits you choose.
Your GM might decide to bend the rules and allow 2-of-a-kind... but YMMV.