To save anyone else from a major headache trying to figure this out in the future... You can use OpenIV to modify your standard.meta file to remove the on-foot and in-vehicle look behind controller binds.
OpenIV Path: mods/update/update.rpf/common/data/control/standard.meta
<Item>
<Input>INPUT_VEH_LOOK_BEHIND</Input>
<Source></Source> <---Null this out
<Parameters>
<Item></Item> <---Null this out
</Parameters>
</Item>
<Item>
<Input>INPUT_LOOK_BEHIND</Input>
<Source></Source> <---Null this out
<Parameters>
<Item></Item> <---Null this out
</Parameters>
</Item>