Patrick, SCB: Passenger service between Allentown and Upper Darby was cut back to Norristown in 1949, but freight motors continued to run into 69th Street after that. Passenger service abruptly ended in September 1951 when the PUC gave permission for a "trial" suspension of service with replacement by buses (where have we heard that before??). Crews were sent out almost immediately to remove rails and wires, handing the PUC a fait accompli dooming resumption of interurban service. Some local routes in the A-B-E region continued until 1952 which could account for references to 2 different years.
And yes, cars did pull into the same elevated terminal for transfers. Because it was all single-tracked, any single-ended cars had to be reversed to a loop track at Markley and Airy Streets as shown in this map posted on the Philadelphia Trolley Tracks site. It must have been real inconvenient for the operators!
Requiem for it's/its, your/you're, than/then, less/fewer. They were once such nice words with such different meanings...