Horse management

[Charlemagne]

How can I make a horse stay where I leave it? I wanted to buy a second horse, for variety. I went on foot, because if I fast traveled the old horse would come along and I didn't want to leave it at the stables. OK with the new horse, I returned to my castle. The old horse (let's call him Tornado) was there. Fine. I even left him inside the stable with the gate closed.

I took the new guy (let's call him Silver) to an adventure. It took a while, and when I returned to the castle Tornado was gone! What the... I traveled to the stables where I bought him, but he wasn't there. So I started looking in real time in all the road from the castle to the stables. This time, when I reached the stables I found the fleabag right there!

So now how do I take Tornado back? If I do, Silver no doubt will start walking towards his old stables. I wanted to see my horse collection neatly parked in my stables but is it possible? Or do I have to travel from stables to stables every time I want to change horse, leave the current horse there and take the new one? And the one I left will start walking to his stables of origin, being unavailable for a long time and also he might be eaten by a troll along the way or something.

Actually, I've noticed that sometimes horses start walking away when you park them outside a dungeon or town. You have to mount them and bring them back for them to stay put. So even a single horse is problematic.