In my opinion, you are actually doing OK on pacing - I would say you are going a little too fast though. Back it off a touch to reduce injury risk. A good resource for guessing what pace is right for you is runsmartproject.com - just put in the the time that you can currently run (PRs from 6 months ago are relatively meaningless). It is based on the methods of Jack Daniels (check out "Daniels Running Formula" for more info). Another warning - those paces do not account for hills or wind - so if your PR is from a still day on a track, you should back the paces off a bit if running on hills or grass or anything that will slow you down.
From the 15:30 5k, your easy/long run pace should be somewhere in the 6:30-6:50 range. If 6:30 feels right, do it. 6:20 is stretching it a little.
Another warning - I have found that the website is better when using times from long races, 5K and up. Take whatever it gives you for the 2 mile with a grain of salt, and from the mile and 800 many grains of salt. Those times are best used only for the interval paces (if you want to use them at all).
Obviously this is not the bible - also trust your coach and how you feel. Your coach may have a philosophy that requires different paces than these.