Wizard Spellbook: Where is all the space?

[Ruethgar]

Now, per the rules regarding Metamagic Feats (PHB 88): "In all ways, a metamagic spell operates at its original spell level, even though it is prepared and cast as a higher-level spell...The modifications made by these feats only apply to spells cast directly by the feat user." So a 1st level metamagic spell, regardless of the level at which it is prepared and cast, is still a 1st level spell. It only becomes a 2nd level spell when cast in a sanctum, or a 0 level spell when cast outside a sanctum.

Actually, Sanctum spells are one level lower when not cast in a sanctum as opposed to when cast outside the sanctum meaning it is a spell level lower until you cast it in the sanctum weather it is cast or not. The specific rule of sanctum would trump the general rule of metamagic.