WowAce

Lately, I will be messaging someone, I've noticed it especially in b-tag, and it will say a completely different name.

Need more info than that. What do you mean by "say a completely different name"? Is it when you relog? Battle.net logs are unfortunately privacy-protected and the names are completely handled by the WoW client. Inconsistencies come from how the client has been coded by Blizzard.

I can follow-up with this, because I think they are referring to the same issue I'm having. Any conversation done through bnet messaging in game is logged with the wrong bnet name. So I'll see a conversation I know I had yesterday with one person but the name designation in the bnet wispers are labeled with someone else's tag. The mislabeling is consistent within one conversation (meaning that the same wrong name is shown throughout one conversation), but if I have a separate conversation with the same person on another day a different wrong b-net name is used. I don't use personal names on my bnet to or from, so its battle tags that are mislabeling, not real life names.

I might simply remove the logging of B.Net messages. There is no consistent way to log them, unfortunately, as B.Net identifiers change every time you log in.

Here's a simple example:

1. You receive a message from your B.Net friend called Bob. Internally, in the addon, for privacy reasons, this person is logged as "BNET-PERSON-1". At no point, the addon receives the name "Bob". When displayed on the UI, however, your WoW client maps that value to "Bob"; but the addon has no idea about it.
2. You logout.
3. You log back in again later, but now, internally, the client has mapped "BNET-PERSON-1" to George, another of your B.Net friends. But the addon only knows about BNET-PERSON-1, and when using it, the client will instead show George instead of Bob.

There is no way for an addon to handle this situation, so I can either log all messages as "A B.net friend", or not at all.

"Fixed" this issue by using internal Battle.net numbers rather than names. It's unfortunately more cryptic, but at least more "accurate" with what the WoW client actually sees. And it won't attribute messages to other people incorrectly.