Question on time allowed to close a short sale???

I am currently dealing with ASC in a short sale process.  They are slower in response than other equally as large and as reputable lenders.  In my area ASC is handling all the prelimanery work for Wells Fargo.  Once it was put in the hands of a loss mitigator at WF the ball did start moving more quickly.  It took almost 6 weeks from the offer being presented to finally getting a loss mitigator.  I am finding this l.m. to be rather unrealistic on the timing aspect.  I demand that all my shortsale listings close 30 days from the formal written offer approval which is a standard and acceptable time period.  This l.m. approves the loan on the 10th sends it in writing on the
18th and demands an April 30th closing!!!  This is an impossible feat in my area. It takes over 2 weeks to get an appt. for a smoke detector inspection. 

Any hinters on how to deal with this???