Murfield Family Genealogy Forum
I had that same question a couple of years ago, but I learned that Rachel Elizabeth Lawson as the wife of Arthur Slayden has been disproven. However, the error has been repeated on many sites and continues to crop up from time to time. Somewhere deep in my files, I have the explanation and the proof.
I have found many other errors and discrepancies on the LDS familysearch site. In spite of the errors, it's a wonderful resource. I consider anything I find there as a lead to be checked out.