Please read.completely, details are important.?

Ok, I have one bikini, the bottoms to which ride, and show an obvious camel toe. They are not too tight, as I actually had to tighten the string ties to keep it from falling off. They are white, if that has anything to do with it. And this is the only thing I have this problem with, all other underwear, jeans bikinis etc, fit fine, unless they are pulled up ridiculously high for some reason (not a common occurrence). Why is this one bathingsuit bottom this way? And what can I do abt it?