hey guys

I am quite new to fontlab studio and i am facing this weird problem.
Everything was working fine until one fine moment when i am working on my Y the guides started behaving crazy. i can no longer right click on them and move them to my desired location.

And also when i am trying to overlap some masks they are not getting overlapped properly i mean some weird white spaces are appearing(i have attached an image)
Please help me

Cheers
Morpheus