I have music (dots!) in which not only does the key change, but so does the beat: one starts in 3/4 with Bb and three measures later is in (ready?) 9/8 with three sharps and in the next line changes to 12/8 with two flats, then back to the original. At least the tempo (sorta funereal) doesn't change.

I don't play that one much.

IF anyone notices tell 'em that the key changes where you did that you sang correctly -- it must be THEIR tonal memory that's faulty.