Transmission Oil pump is located at the torque converter to transmission case opening, so replacing it would require removing the entire transmission (transaxle)
A leak at the pan gasket, cooler line hoses, solenoid pack and differential cover could all be mistaken for a pump leak, as the fluid will run to the lowest point, usually right below the dust cover of the torque converter, centered on the case of the transaxle.
An overfilled trans will sometimes vent through the pressure relief valve located on the top of the shift lever shaft, not in the pump area.
Sounds like the dealer made some quick money off you, by charging warranty for a front pump seal replacement, then never did the repair, (Customer pays deductible, Chrysler pays dealership, Tech gets hours ($$) for doing nothing, customer gets pissed, loses time and money, and dealership get a bad reputation), but they really don't care much unless you complain or protest.
You need to take it back and have them re-inspect the job. maybe they just left something loose (cooler line clamp, didn't really find the leak,?).
ASE Master certified 16yrs.