Currently, all legacy Mate/Align interface constraints are always reversed in Creo Parametric.
This causes the user to have to flip them every time they are used.
To work around this, companies are forced to modify hundreds of thousands of files, changing the mate/align interfaces to the new coincident/offset ones, or users are required to make tens of thousands of extra operations flipping everything. Additionally, there is no differentiation between coincident constraints, so there is no way to tell which "coincident" applies to what feature.
PTC, please fix the new coincident/offset constraints so that legacy mate/align interfaces still work.