No. To my knowledge there has never been a WL bus to the TTC. I've stayed there twice, including once in 2004 and no WL buses ever went there in my trips.
There is a direct bus from WL to MK, if that's your destination.
Also, the WL buses will often stop at the Poly if on their way to EPCOT, MGM or AK. The Poly is next door to the TTC, so one could hop off the bus at the Poly and walk over to the TTC 100 feet to the right of the Poly bus stop. In fact, the buses pretty much pass right by the TTC on their way to the Poly stop, which may be why you thought the bus was stopping at the TTC.