Did you assemble the motor? If so did you use a windage tray along with two of those gasket? If so did you install the gaskets dry or use gasket sealer between the gaskets and the windage tray and block? If not maybe you should.
Leaking between the gasket and block and oil pan are usually caused by over tightening the fasteners squeezing and crimping the gasket around the fasteners instead of having equal pressure on the gasket the entire length of the oil pan and timing cover hence Robert suggestion on the tightening sequence
BTW, the Fel Pro steel lined Teflon BB and hemi oil pan gaskets work great out of the packages with no sealer needed