I think you might be running into the same challenges that affect the Mathews V3 and V3X bows where the sights are mounted right in the middle of the riser.
The quick solution for traditional pin sights would be to swap out your housing ring to something smaller in diameter thereby allowing additional windage adjustments to the right before the housing hits the bracket. This will likely necessitate a change in your peep diameter as well.
However, I don't believe this will apply in your case as your housing is fixed permanently to the bracket. To be fair, I am not familiar with the Xero A1i Pro so I could be wrong.
This is a matter of the sight manufacturers having trouble keeping up with the change in sight attachments on new bows. Is there a way for you to attach the sight on the side in a traditional manner?
Sights like the new Spot Hogg Fast Eddie XL (triple stack) come with a bracket that allows you to mount it in a variety of ways allowing for additional housing clearance. Not sure if other manufacturers are following suit just yet.