for what it's worth, seals are "directional" They have a hydro dynamic feature which pumps oil/air inward thus keeping the oil inside the pan.
If a seal is put in backwards, it will pump oil out of the crankcase, usually at a high rate, which does not sound like that is the case here.
Also, hope there was not an excessive amount of RTV used at the joint. when compressed wet, it can ooze everywhere (into the groove for the seal) and possibly disrupt the compression of the seal in the groove or keep the ears open. Rubber is not compressible, only displaceable. If the groove volume is smaller than the volume of the seal and RTV amount combined, you will not get full compression if that makes sense? I am referring to the ends of the seal contacting (top & bottom) with the correct pressure.
