If you don't show up for school, your date will be readjusted in the system for a later report date. USAREC has a lot of pull when it comes to assignments and as long as you are showing on orders for Recruiting, you cannot be locked in for any other schooling or assignments. Since your not an Initial Term Soldier, your going to either take the assignment or DCSS if you don't have the time to complete a three year tour. If you sign the DCSS, then you could end up on a short tour (like Korea) and then ETS. If you try to have the DCSS removed and it gets approved, you can only reenlist for Option-1 Regular Army for four years at which time you'll probably be back on assignment for Recruiter.
In no way do I favor DCSS, unless you a absolutely sure your getting out. DCSS keeps you from being promotable, no advance schooling, I wouldn't advise the DCSS.