Did you have someone else's (long duration, higher Lore benefit, whatever) better cast already on you at the time?

Someone playing around with how it works on spells whose properties change on levelling?

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I haven't seen any recent activity that would affect this. Since all of the spells you're mentioning are tied to blessing lore, I'd hazard a guess that you have a blessing lore enhancive that died or was removed between casts.

Viduus

How does mana spellup deal with training? Its probably been 4 levels since I used anything but mana spellup and I've added quite a few ranks of spells and lore in that time. I've been vaguely wondering if I needed to STOP everything to pick up the extra benefits but hadn't got around to testing it out.

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Mana spellup is just a mechanism for calling the spells rapidly. The real question is how each individual spell handles additional training in spell ranks - and this isn't consistent across the board - depends on how the spell is implemented and what subsystems it's benefits tap into. I would recommend you stop all spells and reapply them as you probably aren't seeing benefit gains from at least some of them.

Viduus