I, too, have a fascination with "oddball conveyancing problems."

Recently reviewed something similar.  Deed appears to convey not the entire property, but a section of the property where a sewer easement is.

My ancient life experience guess (because I've seen it too many times before):  A secretary was told to "type the description from this deed as a Schedule A," which she did - exactly.  Bad review on the attorney's part (and the family if just one of the had READ what they were signing or receiving it was a simple fix).  Description is typed without error, excellent proofreading job by the secretary.  "Old" deed, family transfer, no title insurance.  At least it still can be "fixed," but at a cost the family could have avoided if a little extra care had been taken years ago.  Note:  Family wanted it "now," many times fast is not a good thing.