protein?

How much protein are you eating? And what are your goals?

Hmmm, I'm not sure how MFP works, but 98 grams seems very reasonable to me. 40 some seems very low. Do you mind telling me how much you weigh?

I know that the website has an amount they want you to stay within...but I always read that protein was fantastic for weight loss and actually helps aid in weight loss as long as it is lean. I try to watch my fat and carbs and stay within the allowed amount, but I do not worry about my protein. I don't understand why it's limited, but I am not an expert by any means, just read A LOT! Maybe someone else has an answer as to why you should and can enlighten us!

i am 10.11 and 5foot 6

Okay, assuming you're talking in stones here, which translates to 141 lbs. 141 lbs = 64 kg. The RDA suggests an intake of .8 grams per kg of body weight, which would total 51 grams, which is close to the target mfp is giving you. I'm guessing that's what they're basing their recommendations on.

Personally I believe the RDA recommended intake is based on very outdated research. Depending on how you're exercising and how you're dieting, I'd say anywhere from .8-1.5 grams per pound of goal body weight would be optimal.

You can change the target percentages of your calories under "goals". MFP's default setting is low on protein. I changed mine and upped protein to 25% (that's just about 95g), which I usually don't reach, and reduced carbs to 45%, which I sometimes go slightly over. It's also ok to vary macronutrient composition from day to day. Indeed, to get all the right micronutrients it's a good thing to vary what you eat! Some minerals and vitamins are in one type of food and others in another type of food. You don't have to hit all numbers the SAME day.

Also, if you're consistently over on carbs or fat (by a lot, like 1.5 or 2 times the number) I'd start to troubleshoot your food intake, but protein is quite harmless to go over within reason. It'll keep you fuller, too, and will help if you're doing resistance training.

I've always read and have been told by my trainer that you want to be at roughly 1g of protein for every 2 pounds you weigh.

That's somewhat better than the RDA recommendations which is based on 30 year old research. However, I'd still say the optimal intake is higher for most folks.

The danger of too much is Ketosis, although you would have to go really far over this amount for that to matter.

And I think you're a bit confused here. Ketosis has to do with an abundance of ketone bodies in the bloodstream which occurs in response to low carbohydrate/glycogen stores. And ketosis is not dangerous. It sounds to me like you're confusing it with ketoacidosis.

its better to get too much protein than too little.
If youre exercising then its good to go over your protein recommendations.