Henry Dickinson - Combining two different immigrant families: the DICKERSON family and the DICKINSON family

The profile is locked. How can I sort out the family tree of Thomas Dickerson and Angela Reeve in my tree unless I can sort out the Maryland family from the Southold family? This is another example of how inactive and unresponsive former curators can prevent cleaning up inaccurate merges when they reach down for generatiions.