I'd suggest selling the Eibach Sportlines and putting stock springs on the stock shocks.
For the price you could sell the Sportlines for, you could easily get brand new stock springs.
By swapping stock springs back in, you could also run in the GS (S=Stock) class.
Is there anything else that's modified on your car?
Unfortunately, the sportlines are not the best spring for AutoCrossing.
They're pretty soft, and are a progressive rate (very soft initially, then ramp up) which doesn't bode well for predictable handling.
The Eibach "Pro" springs would be a much better choice for AutoCrossing if you must go that route.
As mentioned by a couple others in this thread, you really do need the proper dampers (shocks/struts) to go along with the springs.