I don't know much about it but wouldn't they have to have lots of different sections of various instruments and have a conducter and such to be an orchestra?

I understand what you mean, a lot of people here have wondered why they decided to include extra people, but why let it bother you? Personally I don't mind if they are still with the band when they play over here, just a couple more people on stage, it isn't like they have a hundred people up there, just 2 more.