This issue imo the current arrangement of bus stop like buay
soon, cos the bus stop aft camp gate is for North heading trips of
39, 168 & 858, which looks ironical since they need to cut
right lane. Wouldn't it be better if that stop is for the east
heading trips cos it can shun bian left turn from there. Of cos for
86 it's different cos it'll go straight into Jalan Kayu and if it
doesn't call at the aft camp gate stop for AMK heading trips, the
"policy" like conflict cos 103 will go into Jalan Kayu aft that
stop
. Probably to accomodate 103's practice, every
service goes the way it is now
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.