Did a quarry wall dive the other day. Went down to the base at about 50' along the wall until "turn around", then up to around 25' and back to the boat. Anyway, I was no where near my NDL time. Moving up and down a little bit to get over sunken trees etc. I started the safety stop timer somewhere in there. Back at the exit point I was practicing buoyancy holding at 15' and noticed that my "second main display screen" (the one that shows max depth and elapsed time of dive) kept reverting back to the "primary" screen showing depth and NDL only. The instructions say this happens when the computer is in some cautionary condition so it just concerned me a bit that something's not working right. Or was this just because I'd already been through the SS countdown?

Hope I'm making sense here.