Hi Yesenia
The answer is quite simple. I had a detailed look at the first 5 sites and compared some metrics....as you said, the metrics you mentioned indicate that jenzabar.com should not rank number one. However, if you look at their website in detail you will see they are all about higher education services (and the other sites all have this as a sub product, it isn't their main product), so jenzabar (in terms of content) is by far the most relevant than any of these websites, and users looking for higher education software probably spend alot more time on their website than the other websites (so here user statistics metrics might be influencing the rankings). Google has clearly flagged this as the most relevant reliable source, and thinks its giving its users the best experience by ranking jenzibar no 1. Remember, Googles number 1 goal is to give the customer a good experience, and not show the website with the best ranking metrics....makes sense?