I have a Nitek Trio that I have owned for 3 or 4 months. When reading the dive log on the computer I always get a warmer temperature than I am expecting. I have been told that the readout is an average of the temperatures but the manual says (page 36-37) that it displays the coldest temperature reached during the dive. On a dive yesterday the max depth was 69ft. Back on the surface my computer says the temp was 76 F but my buddy's thermometer was reading 44 F. What gives?