Unless there was a rather substantial unstated change, there's a rather substantial bug with crafting spells.
Normally when you make a specific spell, depending on your current skill level, you require a varying number of spell shards.
I.e. For a Flame Bolt I spell, you'd need 6 sandstone spell shards at 1 spellcraft skill, and3 shards when you became optimal.
However recently this has changed so that the minimum number of shards is always required, regardless of how skilled the crafter is.