For an unusual name, there sure do seem to be a lot of branches. I found a gedcom file a while back and it contains a couple hundred Spangenbergs. The practice of leaving living people blank made it a little difficult to identify the branch I have with Linda.
Its been nice chatting with you. I guess with this genealogy stuff, you hit a few dead ends. I thought the same thing that you mentioned in the title. "must be related somehow-somewhere." 8-)