Just to clarify... There is only one bus stop, but there are three sections to it. Each section has two separate buses...
1 - Transportation/Ticket Center
Fort Wilderness
2 - Animal Kingdom/Blizzard Beach
Epcot
3 - Downtown Disney/Typhoon Lagoon
Disney-MGM Studios
To get to the Magic Kingdom, you can either take the Cruiser (boat), or you can go to the TTC and catch the monorail. Also, you can go to the TTC and catch the Epcot monorail.