Strange behavior with psx and multi tap

[robmcc83]

Hi i mainly use my retropie for all things 4 player with family or friends.
I today have come across a issue which i have never had before.
I did a fresh install with 4.3 recently and wonder if it is to do with that.
So after a fresh install and editing config files as per retropie wiki (which i always do after fresh install) i load hogs of war and everything works as it should.
Then i go to play micro machines v3 and controllers do not work yet all 4 worked in hogs of war,
disabling analog makes the controllers work but only 2 of them.
So off i went through all my psx games all of which are 4 player games.
Most worked leaving analog enabled as they should but 3 of them didnt(no controllers work at all)
If i goto to retroarch options and change the pad type from analog to default then the controllers work but only 2 of them i cant for the life of me get 4 players working on micro machines v3, nba jam te or track and field.
It seems after messing around that games that dont support analog wont work no matter what settings i use.
But here is the strange thing, i have played all these games previous with no problems at all with 4 player, the only thing that has changed is that i have fresh installed 4.3
Am i being really silly and have missed something i should of done or could this be a issue.

Thanks
Rob

Pi Model or other hardware: Raspberry Pi 3 Model B Board
Power Supply used: 5V/2.5A Official raspberryPower Supply
RetroPie Version Used : 4.3
Built From: SD Image on RetroPie website
USB Devices connected: 2x usb playstation adapters
Controller used: 4x ps2 controllers
Emulator: psx-rearmed