Buangkok MRT short bus spotting | 4 types of buses on 114 + 27 bus bunching (4 May 2021)

I wonder who (ahem) planned this diverse fleet, but still quite interesting nonetheless, with 114's whole entire fleet of 4-5 buses made out of four different models of buses (O530 citaro, Batch 5 MAN A95, K230UB scania, Volvo B9TL CDGE), plus bus 27 bunching action at Buangkok MRT station bus stop.