Hi am having the following problem i have link exchange with around 6 diffrent sites, their are all pr2+. I was expecting my SEPR to rise due to the new amount of backlinks. but it has decrease.
maybe you are doing a lot of link exchanges. google discounts links gained from link exchanges so may be thats why your serp is going down. drop the link exchange and go with one way link building methods. there are plenty of ways to do one way link building so why bother with link exchanges that take even more time than building one way links? source