Generally Amazon seem to do a good job with printing and are reasonably prompt with delivery. But no-one’s perfect, and I just heard from someone who bought a copy from Amazon recently and found it had been bound partly on the wrong side!
Quite what the procedure is for returning defective copies to Amazon I don’t know. I’m sure there must be one, but it’s undoubtedly a hassle.
I can’t do anything about Amazon, sadly, but I can assure you that any copies you purchase directly (i.e. from this website) will have been individually checked. I certainly won’t be sending out any that have been bound on the wrong side, printed upside down, or any other imaginative but ultimately annoying variations on normal custom and practice!