RotationNavigator Problem

[umeshnk]

For example when I say gotoPoint(200,0) and print the x coordinate on the LCD the robot travels in a line and stops and display 200. But if I suppress the behavior in the middle and ask the robot to display its x coordinates it sometimes displays values over 200 which is impossible. The funny thing is the robot turn 180 degrees and stops at a point where it passed previously displaying 200. I'm worried. Please help.

P.S: robot works fine with TimingNavigator.