CASTING SPELL DISABLES MOVE CLICK

Today I found that whenever I cast a spell i am unable to move until the spell is cast.

ex: As Kayle if you cast Q you can not move until you click a target. If I cast Q as Ezreal i am unable to move to a different area until I cast the spell.

So if you click an area of the map to move to and cast a spell, your character will continue to move to the destination unable to be cancelled by Move Click or Stop until the spell has been cast.

I'm playing on the Mac client and use custom controls. When I set them back to default I was able to cancel properly. I found this problem today. My controls were working fine before.

My Controls are:

Abilities - Z X C V Level Up Spells - Shift+ Z X C V Summoner Spells - Q W Items - E R 1 2 3 Trinket - 4 Teleport Home - B Player Move Click - S Player Stop Position - D Player Attack Only Click - MB2