Issue with Deaver Springs? Thanks for sharing. With all the glowing reviews and bashing of National springs you'd think they where perfect.
Yes, I have nationals and I've had issues as well, which are logged on the forum. But RPG has always been willing to help correct in the past. Sorry - rant over.
Yes, sounds like the springs are sacked. And from the description, it sounds like you got a +1" set when you purchased them. That means they were 1" less than stock hight. If you get new springs be sure to get at least +2 to match stock rear hight. If you have a SCREW you should consider getting HD springs.
You can also find a spring shop to rearch your springs. Will probably be about $80/spring or so.
As for the shocks, you got it. Send those in and get them rebuilt. I've kept my stock shocks for the same reason as well.
Let us know what you decide to do.
Yukon Joe