Case closed. I don't have a loupe but examining the negatives against a light they looks much better than the scans would indicate. Again I'm not that upset since these are just destined for Facebook and Tumblr until I can get into a darkroom, but I'm glad to know it isn't a problem with my camera!
Thanks for everyone's help and suggestions! I've now processed four rolls of film and am getting the hang of that part of it at least. This hobby is too much fun!