Room Treatments added, with negative effects..

Hi Folks:
I purchased a set of foam acoustic room treatments and set them up in my listening room. It now seems that the soundstage has collapsed somewhat, and the sound is less ambient, filling the room less. I'm wondering have I overdone the treatments, or placed them incorrectly or maybe I really just didn't need them to begin with. Can anyone offer any advice or thoughts?

I purchased 12 24inch by 24inch panels of ProFoam treatments from Audioadvisor.com which were pretty reasonable at about $150 for the set. I set up four panels behind the speaker position going from left to right at about 20 inches above the floor, and seven panels behind the listening position (three from left to right about 10 inches above the floor and the other four above those from left to right). Side positioning wasn't really possible because I have glass doors on one side and a corridor on the other.

My system is Audio Physic Virgo, Supratek Syrah pre, Blue Circle BC2 monos, Teres 135/OL Silver/Shelter 501mk2 vinyl rig.

I'm keen to hear any comments or advice on how I can improve my use of the room treatments, or whether I just need to scrap them. Thanks!
Outlier.