Nevermind. I swear this always happens with me, I post a question and as soon as its submitted my issue goes away.

The only thing I did was to swap HDMI ports. I don't know why that would change anything as I original booted with it in the opposite port. I also now realize that the left port is the one closest to USB C plug but when using the NES case the actual USB C plug is on the other side via a daughter board.

@dougsky Thanks, you make my day!!

@rockaddicted

That sounds great thank you!!

So did a fresh install today on a RPi2 - using the same SD card and a Rpi-WiFi dongle and voila !! RESULT !! Not sure what happened last week but today I had no difficulties getting out of games , overclocking options showing up properly and WiFi kicked in straight away after login !! Works very well on RPi3 apart from WiFi - tried with and without Dongle  ! Looking forward to full RPi3 compatability - no pressure  :0) Keep up the good work !