I actually spoke to "Reb" on the phone. He's literally a one man shop, and a retired pastor. Told me on the phone he receives hundreds of emails about letters and proofreading a day and said he just can't keep up with the workload.
PacLove, as long as you understand the message he's putting out there... Make it about her, her feelings, her hurt, her betrayal (by you) and how those things made her feel. Your fine. He didn't proof mine but I made damn sure it was spot on. Do not explain, do not justify, do not talk about how great things were/could be in only xyz changes. Only state the true message that you have "seen the light" and this has allowed you to understand your wrongdoings and how theyve hurt her so badly, you don't even need to say why you know, just that you now know.