can we choose our seating when making reservations?

Yes you can, based on the 'promotion' /price you pay, i.e. You get what you pay for on say "Groupon" v. Group or individual/couple direct reservations with them & who is performing. If you want to 'pick your seating', best to call direct or work with there sales people than say, 'just buying tickets online'. But your answer is, "Yes".

Depends on how you pay and if you book early enough with the combo special you can request how close and where. Call them directly that's the easiest way

We had the dinner special and show, so we couldn't.

I have in the past.

You can request an area.