That is frustrating I know! So here is the deal if you are noticing a huge discrepancy like that I would cross check it on a site like http://www.caloriecount.com
Also I am not sure if you have ever tried My Fitness Pal, but I personally love this app, I can find EVERYTHING in it so much easier than others that I have used, plus it will save frequently used foods.
So as far as the chicken goes, the lose it app is way off. A 4 oz portion of boneless, skinless chicken breast is actually around 140 calories. On this site you can see that:
https://www.caloriecount.com/calories-tyson-foods-fresh-boneless-skinless-i110506
Also calorieking.com is helpful and pretty accurate too.
I hope this helps! Let me know if you need additional help!
-Jess
