They'll be sure that there was one horrendous feud. Lo, some 10 years ago, an Ivy League professor publicly repudiated one of her graduate students who'd been charged with sexual harassment, and then arrested for drunken driving, and then jailed for not paying child support. You, meanwhile, are attempting to be a good character. But Ms. Mentor urges you to re-examine why you think drafting your own letters is unethical. Well, no, for Dr. Major can certainly rewrite the letters to suit his own style.
Most bosses do that.
He gave you the opportunity to describe, in glowing detail, all that you've accomplished. And you showed Dr. Major how best to brag about you, as the best mentors should. Your letters are, in fact, the best and brightest collaboration between you and your mentor. You are also very lucky, for Ms. Mentor knows that some advisers, left to their own devices, can produce very odd recommendations. Still, I salute him as a fellow phallus-bearer.