I think you need something like 5 posts to be able to post photos. I happen to use photobucket. It's free, you upload, then it's easy to share.
The corner orientation happens a lot, unfortunately, and it's simply a major compromise. You won't find such a compromised layout very often if at all with the regulars here.
IMO, you simply have to forget about compromising for both couches. Use the bigger couch as the captain's seat, and do everything to make AV as good as it can be from there. Because of the corner layout, it still won't be perfect, but don't make it worse by thinking of the small couch. This may mean that the "left surround" speaker in fact becomes their* right surround, if you get my meaning, and that the right surround will become the extremely far right surround #2.
Go to various surround sound websites like Dolby, and they'll have recommended angles for both 5.1 and 7.1. IMO, if 5.1, you have the surrounds placed more to straddle side plus rear areas. When 7.1, then have the side surrounds directly to the sides, as they don't need to cover any rear area. Only do rears if you can have at least few/several feet distance to them, IMO.