Sounds like the joists are hung off sill and tops are slightly above the plane of the mud sill, which is good. (No rim joist on mud sill). Around here, 1/8" to 5/16" is normal, depending on the lumber size
, chart on pp.51; http://books.google.com/books?id=iwS...rafter&f=false
Be sure to run the ply deck over the sill for floor shear flow in a diaphragm application (not as pictured in other link, following page), follow 3.6 for shear blocking with running joists on page 17 for minimum 90mph wind zone. Check locally or follow engineered plans exactly; http://www.awc.org/pdf/WFCM_90-B-Guide.pdf
Clothes taking longer to dry?
Clean the dryer screen in HOT water if using fabric softener sheets.
They leave a residue that impedes air-flow, costing you money.
Clean the ducting in the last six months? 17,000 dryer fires annually!