markers - Polylines -lat/lon

Hi to all,
ivao.knut-krueger.de/map/oceanic.ph ...
The Polylines does not match to the map and does not match to the squares also

the black line below Puerto Rico should be lat 10
every grey line is on deg +/-
If you click on the red square you can see the lat/lon of the square (tabMarker)

and I am afraid the tab marker are not t $geodetic , because If you set an tabmarker with a loop at the same latitude and different longitude they will be shown on a straight row.

Any suggestions for that?

Kind Regards Knut