My ticket says I need to enter through door 4, where is this door located? How many entrances are there? Are they referring to doors inside the theater?

Inside the theater. The staff will all point you in the correct direction

Door 4 is inside and is the last door on the right from the main entrance.

There is only one main entrance. And yes, there are different entrances inside for seating!

Once you walk inside the main entrance to the theater, Door 4 may be the entrance to the section where your seats are.

Door 4 is at the front of the building with all the other doors. They just make multiple lines. ☺

Go to ticket window. They will direct you to entrance and where doors are located