On the bottom portion of the membership tab, where details/transactions/renewals are listed, "Dues" is not an option for the columns although it is a field with the membership detail. Same comment for the top Membership section. This would be helpful to see in the tab view and compare the available "Total Paid" field.

A header with a more clear title for this bottom section would be helpful as well. When describing this tab I always have issues explaining the top and bottom sections without a good name for the bottom section!