Heya Ryan, hope you're enjoying CC.
As far as salt is concerned, I don't think that will have too much effect on your weight loss.
With protein, if you consistently go over then your body will start to store it as fat. However I find I often go over especially when I'm eating oily fish, chicken and red meat and it doesn't really seem to have that much of an effect. I think it's because MFP sets you a protein allowance which is well below the normal daily intake anyway, so even if you do go over then technically you're still within the normal limits, if that makes sense lol?