Does anyone know if a Paladin's Crusade Trait loses its effectiveness when ...

Does anyone know if a Paladin's Crusade Trait loses its effectiveness when s/he changes to a new class? As soon as the Crusade skill was available, I was able to train 5 out of my 6 characters as Paladins to get the Crusade trait, but now I'm wondering if its all for naught, as I don't intend them to remain as Paladins for long.

On a side note: Has anyone ever had a problem where they're maxed out on all the attributes (e.g. Int = 18, Will = 18, Spirit = 18, Presence = 18, Strength = 18, Agility = 18, Dexterity = 18, Fortitude = 1 and gained a level and were asked to increase 1 of your attributes but you couldn't because they're all maxed out?

Another question regarding attributes: I know that Ankhs can be used to increase beyond 18, but I have a curiosity in my current game -- my Gnome Assassin has 19 Int, and I'm quite certain that I haven't used any Ankhs on him (I've been using them on my weaker characters, or to quickly qualify for class changes, etc.)

Are there other ways besides Ankhs to increase attributes beyond the 18 cap?

You can actually train in the Guilds in Attributes up to 20!! After 20, the Attribute will disappear. Also, another note, a warlock class is not able train in Moon or Fiend Spells in the Guilds if you haven't achieved at least one level promotion in the Guild (I was bummed about this when I was training some of my warriors before I finished the Serpent Temple Quest -- so I didn't have the Orb of Clarity and they only had one level rank in the Wizard Guild).