I would aviod the county for as long as possible,,there is a chance that this was an illegal subdivsion or partition, gererally when one holds land in unity of ownership and builds or uses land as one contiguous lot it becomes merged. ,but then what to do,,,,who would own the whole lot,,the poster or the adversary. It would then have to be determined if cali is a race state or a notice state as the recordeing of documents goes. in a race state first one to aquire deed is winner,,,in a notice state first one to record or notice the deed is the winner,,but with all law,,cases goes both ways. here in rhode island we are considered a race/notice state, this way the courts can go to the intent of the grantor and apply equity
Bill