It's okay, at least you aren't asking questions I've already answered. I'm not entirely sure. It may be that they don't increase until you unlock guaranteed A and guaranteed SS fusion as the offset/story progresses. To be honest, I wouldn't put too much stock into things like stats limits if you're at the stage in the game where you think +26 is a high or even good offset. You will be changing monsters far too often to min/max right now. Just look for high atk limits for physical attackers and high int limits for magical attackers. Somewhat related, try to get a mutated monster as soon as you unlock the feature from Scout Q quests. Fusing it will create two child monsters instead of one, one being a Rainbow Fondude who gets the same offset as the other child. The Rainbow Fondude also creates two children when fused, making raising offsets much easier as you have unlimited fusion fodder. It'll say something along the lines of "Mark of HPGain." Traits from items won't show up in the library, and I haven't tested it but common sense would dictate an increase in monster item drops. If my memory serves me you should unlock it no later than the end of the third world. Whatever the graveyard place is called.