CAS user appearing twice when viewing All People

Hello. I am having trouble with “people” appearing twice when I view “All Faculty & Staff” on my site. For example, Ian Shapiro (and I’m sure there are a few others) who are two people types, a “MacMillan Faculty Member” and a “Staff Member”, and they have been tagged as both types. They display correctly when viewing each individual type (Faculty and Staff) individually from the side menu, but when viewing all the people (my default page for the people page), anyone who has been tagged twice shows up twice.

See Ian Shapiro in the example page referenced above.

Is there a setting to prevent this from happening? Is there a work-around for this aside from not selecting 2 types?

TIA - Lisa.