I've noticed something odd recently and I was hoping that someone could help shed a little lite on the subject of traffic and SERPs. I keep reading that an increase in traffic will not help your rankings in the SERPs (ie buying traffic). However, recently I purchased a directory submission for one of my sites and there was an increase in traffic on the day of submission that was about 10 fold above average. The following day, traffic began to return to its normal volume. I didn't think much about it until about two days later when I jumped from mid page of page two to mid page of page one in the Google results. I keep a close eye on all my links and nothing changed prior to or subsequent to my jump. The only change for my websites was a large jump in unique visitors on the day of the directory submission. Of course eventually my website returned to mid page of page two but it dropped slowly over a course of three to four days. Have I missed something?