I have figured something that it may make noobs life easier, like me.
when doing a combo don't center the pointer on the core, just make it a little bit upper and more left.
you can see why is that, if you played ONS-Dria (or any large map) and released a core without combo it. (use a custom pointer, make it a black cross)
you will notice that the core will not be in the center of the pointer. it goes to the right bottom corner of the pointer (the black cross).