I still don't think a lot of people have figured out what to do with women's MMA. There aren't really enough high profile fighters to be able to create different weight classes for televised and PPV events so they are getting lumped into one weight class which isn't really natural for them. Cyborg and Carano should be fighting at a heavier weight and Akana should be fighting at a lighter weight than them. The bottom line is that they fight where the opportunites and money is right now, despite the risk to their health and career in terms of losing.
Remember the first season of The Ultimate Fighter? How many guys then and even since then have fought at unnatural weight classes just because they wanted an opportunity?
I'm not saying it's ideal, but it's a business and these guys have to make a living somehow.
pssst ---> A LOT is two words
WTF is an "amatuer" ? Ama-chooooo-ur? as seen under my nick.