First of all, I'm very sorry if I overwrote local edits. I know first hand how discouraging that is, and I try to be cautious and mindful when I edit, but it sounds like in this case I went too far. I did several sets of edits, focusing mostly on roads and driveways that were mostly untouched and had visibly bad geometry (mostly those originally imported from the notoriously poor TIGER data), adding missing tracks and driveways where several recent aerial imagery layers agree, where it seemed pretty safe. But it sounds like I went too far, and I deeply apologize for that. Would you care to share some more details? Feel free to PM me. Perhaps I can help, to some degree, to rectify the situation, or at least learn from it.