Total mana increasing on it's own?

[Zehnvhex]

Maybe I'm just not looking at the manual hard enough but is your total mana supposed to increase without you taking a talent/equipping items to increase them?

What I mean is, and I'm not sure if this happened after I gained a level or something, but seemingly at random my mana will jump up. I was at 26 points and then it suddenly jumped to 60ish.

I do have the mana regen mod installed (I absolutely detest the sitting around doing nothing for a few minutes after each fight as a mage). Just curious if you're supposed to get jumps in the amounts of available mana or if the mod is screwing up.

Thanks!