It is not infrequent that a single contact may have more than one relationship with another contact. For example, I may be the business development manager for product A and the budiness development manager for product X. Currently, the two relationships can be entered, but they are shown as one after the other seperated by a comma.
When I go to the contact that has the multiple relationships, I can click on the "Relationship From" for the sort and then find the one I'm looking for. It makes it hard to find the two if the multiple relationships are on the same line and only seperated by comma.
My recommendation is to allow the multiple relationships be listed seperately.