Caster adjustment problem

[bherrm]

Has anyone ever incurred a problem when adjusting their Caster? I just got my truck back from the shop and they tried to do a tru-alignemnt and it worked for eveything but they are unable to adjust the caster on my right side because it is maxed out.. are there bigger caster adjustments that you can by or has anyone every seen this problem? See the attached images... THX

Thanks