You didn't say if these "elders" knew previously, but I'd say that it was a case of their files not being up to date and they were calling everyone from an old list.
There was a Youtube video going around of a former prominent elder who left the organization and several years later he was called by someone from another hall to come and give a substitute talk because his name was still on an old list. So he did an "apostate" version of a Sunday talk and got booted off the stage about half way through.