My formatting was also totally messed up.
*AFTER* I published 3 short stories (they looked perfect), a friend bought one and the formatting is completely screwed up. Words outside the margin that she couldn't read, even if she made the font the smallest size possible. I went back to the short stories that I published, and re-reviewed the manuscripts (for the thousandth time) on my Mac Nook and I not only saw words outside the margin, but WORDS ON TOP OF EACH OTHER. Unbelievable! Later I went back to check - went through the same process, and once again, everything looks completely normal. What the heck!?