I never shot from Scout but the fork hit - I believe has nothing to do with the design and with make of that slingshot.
What I can think of is, firstly, it is possible that the bands on left and right side are not equal in strength, and there can be a number of reasons for that no matter how much attention the maker put into cutting them precisely.
Secondly, it can be the release or not holding the slingshot right, that is, the center of the ammo and tips of the right and left fork do not make a true letter "V".
cheers,
jazz