Reading guides and wiki on Blue Mages I came across a statement regarding the levels of our spells which i dont quite understand.

"The Blue Magic skill level of each spell is equal to the Blue Magic Skill cap at the level at which the spell is learned."

What exactly does this mean? Also If I learn a level 1 Blue Mage spell at level 11 does that mean the spell is harder to get because the spell would be level 11 or after you obtain it it becomes level 11? For example a WHM has several cures ( cure 1, cure 2) and so on. But we only get say Pollen, but does it get stronger as we get higher? PLease help me understand. Thanks guys...