However, converting that to 1 in Xyears is incorrect.
Then why do
you do it in your calculator?
Your Average Time per Block: 1768days 19hr 43min 37sec
I find I'm liking your logical mind more and more. You are, however, arguing with Kano which will get you banned or jumped on by half the community. Just a heads up.
As for your bestshare issue, it could be due to mining at a different site. One of your rollovers maybe.