The John Henry Mackey who married Anna Maria Angelica Munte is not the same as the one who married Gertrude Catherine Miller. The John Henry Mackey who married Gertrude was born in 1818. The John Henry who married Anna was born in 1840.
(I'm working from memory, but I chased the wrong one for hours yesterday. I'm researching John Henry & Gertrude Catherine Miller Mackey for a gggranddaughter of theirs.)