I Do recall seeing that a few times when I either applied the vendor fix or o.reload MonumentAddons command, can't remember. I "think" each time when I see it it counts 5 or 6 maybe. I have your 3 custom villages with stables that needs the stable master, Outpost that needs a stable master, two custom ranches with stable masters and also under each ranch under the ground I also have an original big barn stables under them so the map shows there is a big barn. They all have their Stable Masters correct and not shop keepers though.