look at the routes of 86, 103, 39, 168, 858.
then look at how it's arranged.
svcs coming from east and north, going to west and south call at
after camp G
(39: to Yishun, 86: AMK, 103: Serangoon, 168: Woodlands, 858:
Woodlands)
svcs coming from west and south, going to east and north call at
before camp G
(39: Tampines, 86: Sengkang. 103: ulu place, 168: Bedok, 858:
Changi)
now tell me if it makes sense 
now think. if 85 was the one to enter camp G instead of 86, this
will be drastically different.
so u also meant to say that the current bus stop placement is
buay soon? . But what's the point regarding 85? If it
comes in, they would let it stop the way 39 does isn't it?