I have those same excellent parts-- the 935-style spring plates from Eisenlohr Racing Products. I bought mine from Ira at Tarett Engineering.
Both great people and great companies.
It looks like you used the upper level choice on the chassis end of the spring plates. That essentially raises the outer pick up point from a stock location-- if I recall correctly, the amount is one inch.
If so, you will likely have changed the range of adjustability of the spring plate/trailing arm assembly such that you can't get the numbers you want.
If you also changed the inner pick up points via camber pivot boxes, and therefore have both outer and inner pick up points raised-- there can be great handling benefits...
But if you still have a factory cross member through which the shocks are located, and you have coilovers, you may have interference.
On my car I have the spring plates AND the pivot boxes. Plus coilovers and the factory cross member.
To get the camber numbers and ride height numbers I like (about 2.25 -2.5 negative and very low height), I have to use the "center" location on the chassis end of the spring plates.
My outer pickup points are therefore at stock height My inner points are a little higher than stock by way of adjustment of the pivot boxes.
The other thing to realize is that the trailing arm end of the ERP plates have one slotted hole and one circular hole. The slotted hole location (top or bottom) can have an effect on the range of camber you can obtain.
See the excellent diagram prepared by the folks at SRP that used to sell these plates.
Feel free to send me a pm-- I do my own set up and have some experience with these parts.