I have to assume as a close friend of becky, that still hung out with her post-transition, that must have been something becky was ok with. Alot of older trans are not very sensitive about getting it all absolutely correct. And especially when their old name is the one they are famous/well-known by.

Plus it was written in a timeline of their life and post-transition switches to they. It may not be how younger trans have setup the rules to work, but it doesn’t strike me as something that becky would have had a problem with.