Michigan Stadium Seating Chart (Rows)

Does anyone know what row the corner sections (7, 8, 16, 17, 29, 30, 38, 39) start at? I saw a craigslist listing with Section 7 Row 23 for ND game and was wondering if that is actually a row, or if it is a scam (there are other reasons why I think it is a scam).

http://www.michigantickets.net/stadium-seating.jpg

Thanks in advance.