Aladdin questions

So i'm heading to see Aladdin this Sunday at 1:00pm. I'm really hoping to see James Monroe Iglehart and Adam Jacobs because they were out last time I saw the show (about 2 1/2 years ago) - Do they typically perform the Sunday matinee? I'm guessing there's just no way of knowing until i'm there but I thought i'd ask.

Also, does anyone from the cast sign autographs after the matinee at the stage door?

and my last question would be that if I were to buy a t-shirt would I be able to exchange it if it's too big or too small? I wouldn't know until I got home but i'm planning on going back to the city the next weekend but I don't know how i'd exchange it without another ticket to the show? any suggestions?

Thanks!

Might not be too helpful since I haven't seen the show since May 2014, but, both Adam and James signed and took photos at the stage door (Courtney was out, her understudy did the stagedoor) Both were very nice; james was extremely outgoing and appreciative.

Thanks for the info! Really looking forward to Sunday!