No, being over your protein is fine - in fact I believe MFP under-estimates how much protein a healthy person should have in a day. As long as you're not way over for your calories, you're fine.
It depends on how much protein you're considering too much. A gram per pound seems quite healthy in maintaining lean muscle, but excess of that can cause health issue. It's not common, but gout has been known to occur with too much protein.
Everything I read seems pretty consistent, the RDA is .8 grams protein for every kg of body mass (.36g / lb) and that protein should not exceed 30% of your total calories (slightly higher for body builders) and there are health risks associated with consuming too much protein - most notably kidney damage. What I haven't found is at what threshold one might be incurring a health risk (in my case I'm a little over 200 lbs so at .8g/kg my target would be about 74 g, if I use 30% of 1720 cal (4 cal per g) my maximum would be 516/4 or 129g That's quite a variance, no wonder people are confused)http://www.medicinenet.com/script/main/art.asp?articlekey=50900http://www.daveywaveyfitness.com/nutrition/8-side-effects-of-too-much-protein/http://www.ehow.com/about_4741143_effects-much-protein-diet.htmlhttp://weighttraining.about.com/od/nutritionforweights/qt/protein_howmuch.htm