In all four paradigms, the model learns that the RTR-RTR candidate violates M2 and the ATR-ATR candidate does not; this appears to be the model's attempt to reinforce a pattern in the lowest-ranked faithfulness constraint (PARSE[atr]), which the ATR-ATR candidate never violates.
while the IBPOT constraints are not identical to the phonologically standard ones, they reflect a version of the standard constraints that is consistent with the IBPOT framework.