Your rates are probably fine for your experience level and what you are doing. Once you progress a bit more, you should be able to double your rates and get it. $125-$150 an hour seems to work out once you crunch the numbers for most small portrait studios. If you are accounting for everything you should be (ie, liability insurance, your time spent on marketing, website, accounting, taxes, planning, archiving images, etc), you'll find that at $75an hour, you're probably taking home $12.37 per hour.
If you aren't accounting for everything related to the business, it will seem like you are really doing well. Right up to the point where you get busy and find yourself working 60 hours a week and at the end of the year you take your net take home salary and divide by 60 hours a week. Then it hits you! Ouch!
So make sure you are taking into account everything. The time you spend on the phone talking with clients should be accounted for. Either taken out of the potential profit from the job, or included in your overhead. Same or when you spend time on building a new website, preparing the taxes at the end of the year, creating a new marketing flying, even taking out the trash. Who is paying for your time doing those chores? The client or you? It all needs to be accounted for and included in your cost structure. Everything you don't account for, gets taken our of your profit. And if you don't think it adds up, take one week and account for everything, then apply it against the jobs worked on that week and see how it shakes out. Most people will be very surprised.
Once you really know what your business costs to run, you won't be asking what you need to charge any more. You'll already have the answers you need to determine it yourself, and compare it against the market and your competition. Its worth putting yourself under the microscope and doing the math, and its the only way you will be guaranteed to know where you really stand.
If someone else says you are charging too little, or two much, how do they really know? They don't know what your costs are. How much you spend each year in advertising. What your insurance costs you. Without knowing, its just a stab in the dark, and not a good way to base the profitability of a business .
Another hint I should pass on regarding your website. You have too many images in your portfolios, and should weed it down to your best. There are quite a few images that are mis-focused and really shouldn't be in there at all. There are also a few that are duplicates with different effects applied. You should pick the best one of those, and use it, but not all. If you want to so the different effects, use different images rather than a series of the same one.
I would also remove the commercial photography reference until you have enough good examples to show. Think of it from a buyers point of view. If they find your site based on searching for a commercial photographer, then only notice one image set of commercial photography, they'll move on. The next time they search, they may never click on your site and gloss over it remembering that you didn't have what they were looking for. And in the mean time, you may have improved dramatically and have a whole slew of great images there. You don't want to dilute your name, but rather come out strong from the beginning.
Bottom line, strengthen up your portfolio, remove the images with issues and only present your strongest stuff. 10 awesome images will overpower 1,000 mediocre ones any day. Then start moving up your rates when you feel confident about it. But in the end, I would say even at your skill level you are on the low side with regard to pricing.
(wow, I went back to proof read and spell check and realized I wrote a book. skipped the proof reading, too much to read 
