Okay fellas I have the answer for both of you. I too did the same thing and lost the restricter in the vacuum hose. I had replaced the turbo to a VF22 unit and I threw the hose away!!!! I only boosted 9psi forever not knowing any different. Anyhow, on to the fix.
In my case I replaced the line with a silicone line. So, to add a restrictor I took a NOS fitting and chopped it in two. I took the smaller piece (the NOS fitting is like a mushroom, get rid of the top part and keep what looks like the stem of the mushroom)and stuck it in the line. FIXED. Now with my Vishnu ecu I boost 17psi!!!!
As far as which way the stock piece goes, I don't think it matters cause the vacuum signal isn't being lost anywhere, just restricted. But if it does matter, I'd say to put the smaller piece going towards the IC and the big piece towards the turbo.

 

get a UTEC from TURBO XS I have one and love it, I was considering getting a reflash ECU which is cheaper but I was like if I get something new I have to send the ECU in for another reflash and Vishu charge and ARM and a Leg like 100 dollars if the previous mod was not purchase from them. And why will you buy sti injector for 499 from Vishnu, when I can get it everywhere for 375. After I purchase the UTEC I can really understand how to tune the WRX and come with built in knock control which is really safe if the UTEC sense a KNOCK the check engine light will flash on and off this tell you the UTEC sense a knock then the UTEC retard the timing the purpose is to tune the car intil you don't see and engine light flash with no knock I don't thing a reflash can do that.