I found the more weight I lost the more I struggled to get the lbs off. At one point changing my dinner menu up a bit and jogging my calories slightly took me out of weight loss plateau.
I am a little more relaxed now on what I buy but certain habits have stayed like lighter cheese, 2% milk, not upping my carbs etc if it's just cheese and dressing as long as it's in moderation then I can't see this setting you back. Read labels in dressing for added sugar etc remember where you've got to and remember it's not just a diet it's lifestyle changes