Selection Tool

hey guys

I have a little problem! all of a sudden, when i do select the ‘selection tool’ it will not allow me to select any where on the track!? when i do select a certain area on the track, it will only move when i have selected a whole number. it is extremely frustrating! is there a setting that i can alter to fix the problem so that i can select anywhere on the track?

i would appreciate any help on the matter.
thanks heaps!

See here: