Both front sails can be controlled, and should be otherwise she won't sail well.
All three sails can be controlled from one sail servo.
I would set it up so that each sail, going forward from aft to fore, should be a little bit further out than the one behind.
The angle of the mast relative to vertical is not important.
The angle should be one that allows the boat to sail with slight weather helm. If you boat has been built from a plan, the designer would have sorted out all of the important dynamic issues (CofE, CLR, etc.). If the sail plan (size and shape of sails and mast) is as shown in the plan, it should only be a matter of tuning the rigging.
Once you start to stray from the original plan, you risk compounding some problems and adding new ones to the mix.