Question about Suunto Cobra

Just did my first 2 Quarry dives today with my new Suunto Cobra and I notice when I use the PC software that glass circle looking thing in the top right says Temp 32 F. If I click around the graph I eventually get the correct temp and the correct temp is displayed on the Dive details. What is this 32 is keep refering to?

Also for some reason my date was incorrect, so I changed it on the computer, now my Cobra list each dive twice, once with the old date and once with the correct date. How do I nuke the old ones so my next dive starts at 3 rather then 5.

I have yet to figure out how to delete old dives. I heard you have to go through their website to do so but it eludes me. As for the temp, don't worry about that. It should take an accurate reading at the surface and at the deepest depth and record it. I think 32 is just default for times when it's not saving a reading. Regarding date, as long as it's accurate now and only logs dive once each from now on, you're set!!