If they are seriously choosing between all the labels you mentioned, no it is not normal. Sometimes docs make mistakes, but most of the time they have some kind of idea what type of disorder it is even if they cannot pinpoint it. Some of them can be hard to distinguish between, like avpd can be misdiagnosed as social anxiety, DID can be misdiagnosed psychosis and bipolar can be misdiagnosed BPD. But I haven't heard of anyone who could have most any label. There are usually some core traits. Some people however, have issues that are a bit spread out so they need more than one diagnosis to describe, I'm such a person.