RC Pier

When entering loads manually for a wall type pier, what is RC Pier referring to as cap loads?  Is this the pile cap?  Some load screens also have a tab for footing, so this does not seem to make sense.  Is it the top of the pier even though a wall type pier does not have a cap?

When entering vertical earth loads for wall type piers, RC pier requires the entry to be in kips per linear foot instead of kips per square foot on the footing tab screen.  Is this a load per unit width or should you multiply the earth pressure by the entire width of the footing to determine this number?