Not really blaming TG. I asked about it when I was talking to the neighbor before doing the seeding and she didn't even mention it.
I aerated it and raked the cores apart instead of bringing in fresh material to topdress. It wasn't the most ideal way to get it done but she was looking for the least expensive way to get it done. She didn't want to do sod again unless the seed didn't work.
I'll have to try the charcoal and see if that does the trick.
I'm going to have to think about it a little more to see if I should be fixing it out of pocket or whatever.