Welcome to internet genealogy, where, if a line isn't given by the best modern books, we just dig it out of an old book. Because all sources are true, aren't they.
Yes, the aristos were mostly interrelated.
You'll get better results starting higher up the tree. You have at least 3 direct descents from Malet, but owing to a quirk of the algorithm, you're being shown as a 2nd cousin instead.