I put Mr. HInder in copy because I will be absent for two weeks (02th-13th of Dec), that he is involved in the running questions.
Yes I just check the both standard drawings for hole and snap- you are right in worst case it could be that the snap doesn´t snap- that´s really not o.k.
IC-changed the tolerance field. In version 00 the tolerance are small and I think in function.
Let us discusse with the supplier if his inserts reached the value 1,1+/-0,015, if not which value he reached. On this way we can decide which diameter could be successful. It is normal that after moulding the diameter overstressed and get another diameter as the tool insert.
From your point of view absolute right analysed- here is really something wrong.
Please contact production and discuss together with supplier.
It seems that after all we need again an own standard for 1,1, that´s why we have so much different standards....