While this obviously is a big deal to Homer1, behind the scenes, it's not a big deal. It'll be fixed, no problems.
no problems
Big problem it never should have happened,change firms?
There is a chance that the broker will fix things, and certainly prudence would indicate that a person should make an initial effort to get things fixed without an expensive lawyer, but based upon my experience with brokers, one shouldn’t be optimistic.
Unless the recipients recognized their great fortune and cashed it out ASAP.