There was just a thread on this a few days ago. It's a design that crops up here and there, seems to
work, and since the shrouds aren't actively chafing the
aluminum slot, it's going to be OK. The mast makers couldn't know the precise angle that the shrouds would exit, so they guessed at the slot location and got it a little wrong. If it was a big deal you'd have
lost the mast already.
Sail victoriously!