There was so much confusion surrounding everything that happened behind the scenes of this company, so you can't expect that she would know who is who.
The registered agent is always the one accepting service, so naming Billy is meaningless.
Maybe she THOUGHT he was the CEO, but you are taking her word as gospel.
Maybe she needed a way to draw him into the fray.
Regardless, you simply have her allegation without any further facts to support this.
Hey, believe her if you want to.
She lost her claim.
Probably was wrong about other things, too.