When you say "kicked to the left", do you mean, while the arrow is on the string it points to the left? Or that it flies or kicks to the left when shot?
Do not narrow a bendy handled bow in an attempt to get the arrow aligned closer to center. There is a very good chance it will break. Leave it as it is and use an arrow with a weaker spine so its paradox will take it around the bow and straight to the target.
The same thing goes for an arrow that 'kicks' left off of the bow when shot.... it's too stiff. Use a weaker-spined arrow.