Yes, you're missing the fact that you've used up the 90 out 180 days and in danger of being an "overstayer".
The 90 days is calculated on a rolling basis, in arrears - this means you can only stay for 90 days in any one period of 180 days, not the length of the visa.
If you dont fancy the Dalaman Express, my advice would be to get an RP - pop along and see Inspector from here, he'll sort you out.
JF