sweetraven, on most questions it isn't too hard to find your last answer, but some threads are very long. You will find that if you answer new questions or questions without a lot of answers (which is most of them) that your answers will be easier to find.
The first question you answered had over 1,100 answers to it, this one has less than 50 so far, so it has fewer pages. Most questions don't get this many responses and usually run one of two pages at the most. The founders of the site probably didn't envision their site being used the way it is now. Being able to change the listing from oldest to newest to newest at the front may or may not be possible. It might get awkward with threads like you posted on with over a thousand replies. Having to reorder the posts every time instead of just tacking the newest one onto the end might be hard or slow things down.
But it's a good idea, and you can also suggest it to Yedda through the feedback link in the upper right corner.