
Originally Posted by
NewbieOne
That's just because you were able to hold multiple titles, including multiple tier titles, with different lieges. In theory you could be your own vassal's vassal in your capacity stemming from a minor title at the end of your title list. But you're only vassal when it comes to that single specific vassal title and you're independent when it comes to all the rest. It's only humiliating that you may actually still have to bend your knee if you want to keep the minor titles.
On the other hand, Scotland was for a moment considered a vassal kingdom of England. The Celts also had vassal kingdoms. Poland had dukes as vassals of other dukes (in-game, the highest of them is represented as king, in real life, he was the "prince/lord of the kingdom of Poland"). Also, while this would be very rare, you could have vassals with higher titles than their lieges, e.g. Brandenburg was a margraviate while being the liege of Pomerania, a duchy, from 12th century onward. I think this was before B. became an electorate (which made the ruler of it a very high prince, above a duke in honour).
In Slavic countries as well as in Germany, you'd also preserve the highest title (although not king, only prince/duke or lower) for all the junior sons in gavelkind, although they could end up being vassals to their older brother, even if holding the same tier title (e.g. all sons as dukes but the eldest as at least nominal overlord of all), which is especially true of princes/dukes (counts were basically magistrates, royal appointees, who followed different rules even if hereditary; in contrast, princes/dukes were proper rulers, monarchs). In-game, they'd just get a county, barony etc. and forego the higher title.
I'm also pretty sure it wouldn't be unheard of for barons (i.e. lords not good enough to be counts while still higher than a simple knight) to have other barons as vassals.