The sad thing about the Harry Potter universe is that thinking too much on almost any part of it results in Fridge Horror. It is a rich, entertaining tapestry, but it was assembled piecemeal with no long-term planning except for the overarching plot, and so details were added as time went on that make sense for the book they're in, but turn earlier books into a mess. I think this, more than anything else, drives the fan writers and fanon -- the desire to make things make sense.
-- Bob
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Then the horns kicked in...
...and my shoes began to squeak.
-- Bob
---------
Then the horns kicked in...
...and my shoes began to squeak.