||1) Why not, but don't get obsessed with it.
2) Try not to make a scene.
3) Absolutely. But every shul has people going in many directions. There are ways of being inconspicuous. For example, if you really should be facing a bit to the left, put your siddur on the Bimah from the side and you'll automatically be facing in the right direction, a bit of an angle. The people looking will think you're just trying to see your siddur better. No-one will notice.