ads problem

hi after matching the two port atf36077 with s11=-9db,s22=-9 db at (8-12 ghz),without using the discontinuity,if i use the discon.the resuls change alot,if i neglect it,is it affect the layout and the s parameter results,also if i put lamda/4 for the gate and the drain ,it also affect the result.what i do pls help me
if i want wide optimization what i do?
here my file

What do you mean by discontinuity exactly?

hi,i means the tee connection,cross connection,step connections
regards

you can add the microstrip T-junction named MTEE from the TLines-Microstrip in ADS.

All discontinuity models (TEE, CROSS, BEND, STEP) available in ADS & very accurate