People should stop "calling out" the Williams sisters for things. It's getting old, sorry. They were never baptized as Jehovah's witnesses so any disfellowshipping offense would not apply to them. Nor would I expect them to be up to date with all the tweaks and changes in doctrine and policy.
I "claimed" to be a Witness my whole childhood though I was never baptized until much later. But that was all I knew. I sure it's the same with them.