Relationships shown in Team Server ER Objects - including Subtypes?

In Team Server when viewing Relationships in the ER Objects tab the list includes both relationships and subtypes.  This gives me a serious data quality issue if I expose this to data stewards:

1. It exposed true relationships with verb phrases etc that are well defined and follow our standards - as expected.

2. It also exposed subtypes in the relationship list, these appear are malformed relationships (type is identifying, missing verb phrases, Business Name  is "ERROR: String not found in file").

This seems like it isn't the way this should work as I can't stop subtypes them being exposed as relationships or distinguish if they are a true relationship (with data issues) or a well-founded subtype.

Regards, Andrew