Sigma 1606L Wheel Size: Sheldon Brown Vs. The Manual

So I just got this bike computer hardware installed and it looks like everything is working fine. Now I'm trying to figure out what wheel size to use and here's the problem. Number one (#1), the manual sucks. Number two (#2), my wheel size is 26" X 1.95" which I thought was a really common size but it's not listed in the manual or on Sheldon Brown's conversion chart.

When you enter wheel sizes into the bike computer, it has a decimal point after the first digit which confuses me. What is the actual unit of measure on this puppy? And now, here's the main problem.

The values in Sigma's manual that came with the unit are DIFFERENT than the Sheldon Brown website, and neither one of them shows any decimal points. So, which one is right or wrong? I guess I have to average the two closest sizes and use that for 26" X 1.95" ?