Paladin and Ranger Caster Level Inconsistencies

On my recent (ongoing) play through as a paladin I noticed that the classes caster level behaves weirdly: When casting a scaling spell like Armor of Faith or Draw upon Holy Might, the result is weaker than what I anticipated. On level 9 and 10 respectively AoF just gave 5% Resistances and a DuHM on Level 12 only increased my Stats by 2, while the one from the special ability gave me 4. I had comparable results in all 3 games, with the Ranger class as well and honestly don't remember this happening in the past.
Now, this made me wonder: Is this intentional, since these Classes unlock their casting at a later point? If so, I'll make a a feature request to add this to the class description, since it IS significant. If not, it goes into the bug section, since it's an inconsistency either way.
I'd really like to hear some opinions/knowledge on this matter before going to redmine.
Now, this made me wonder: Is this intentional, since these Classes unlock their casting at a later point? If so, I'll make a a feature request to add this to the class description, since it IS significant. If not, it goes into the bug section, since it's an inconsistency either way.
I'd really like to hear some opinions/knowledge on this matter before going to redmine.

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What I don't like is that goody goody paladins get level 4 spells but rangers only get up to level 3
Seriously, I never thought about caster levels like that. Good to know.