No. If you have unarmed strikes at +12/+7/+2 and secondary natural attacks at +6/+6/+6/+6/+6, you would take your attacks in descending AB order:
- unarmed strike @ +12
- unarmed strike @ +7
- bite @ +6
- bite @ +6
- bite @ +6
- bite @ +6
- bite @ +6
- unarmed strike @ +2
A 1289 Yes.
Racial bonuses are qualities not derived from class levels, so you lose those when you lose the racial form which grants them.