[moehoward]

Not necessarily. Often with these these common areas, the homeowners portion/percentage is signed over to the HOA by some instrument similar to a quit claim. The HOA (LLC?) is responsible for maintenance, taxes, insurance and keeping contact info current. Otherwise all homeowners in the association could be sued for damages occurring in the common areas.

What I find hard to believe is the Tax Collector waited 30 years to auction the property.

[AndyJackson]

Yes necessarily. The portion is not signed over under a "quit claim." The deeds of the common areas and the deeds of the individual homeowners properties are tied together through restrictive covenants granting easements and burdens of costs maintenance.

And the requirement for joinder is invoked by the homeowners having an "interest" which does not require holding title.