I've been building a cabin downstream from Riverwood for a few days now. I'm almost done, but during testing, I've found that, when I fast travel to the house, my horse travels to the Riverwood fast travel marker, not mine. I'm a bit confused.
Is it a navmesh issue? I haven't done any work with that, inside or outside the house. I don't use followers, and I'm not bothering to navmesh if the bug still exists.

Any ideas?