It seems to me responses slow down a bit on the weekend, so I can't say you've done anything wrong and I would say someone will respond soon enough. Though, one quick note would be to try and limit the number of boards to a half dozen or so(although 8 in a picture is not extreme by any means) and number them in pictures showing both front and back (if there is population on the back side). More posts with less pictures makes going through for grading easier and more likely to get quicker responses it seems.
I'm not really one to give grades yet but I can say that typically brown boards go as low grade as there's no substrate on the brown side, therefore making it low value. There are definite exceptions, mouse boards with gold pinned IC's on them (I've just had recent experience with them is why I mention them) are one of the few I know for sure (possibly the 7 segment displays may make a difference but I think it matters the type of display some, so I don't know on that).
Lastly, I would have to say that grading cards is a bit more of an art form than a science (as I believe I've seen stated as such) and is very overwhelming when you first try to sort things out, looking at pictures and what things were graded, and asking questions has helped me most. You can always email Chris @ boardsort when you aren't sure of the answers you are getting or answers you aren't getting. One piece of advice is to have the board prepared exactly as you want it graded when emailing Chris though, he's not going to be able to go through every picture he receives and say remove this or that for a higher grade.
Here's a little bit of reference in general aside from the pictures on the price list:
https://boardsort.com/escrapforum/viewtopic.php?f=3&t=21765