hfss ..wave and lumped port

hi im a beginner at hfss.. i could not understand the use of wave and lumped port.
i tried both and i am getting different result in each case
moreover with wave port there is always an overlap of port with radiation boundary and warning is generated.. can anyone help

ignore the warning....it is no an error....
Ansoft guys teach that at the training
session.

but still the two results don't match..
i mean the one with the wave port and other with the lumped port..
how can I know which one is the correct result