Don't think the fault is yours, the lane markings are misleading.
MOT, LTA are in a mess.
The roads and road signs are so bad.
Look at the exits on PIE from Jurong towards Changi near Upper Serangoon Road. The signs are confusing. There are five signs...
(1) to kallang,
(2) to KPE (TPE),
(3) to KPE (ECP),
(4) to Sims Ave
(5) to Changi Airport
Totally confusing!