torque converter and torque converter seal replacement

hello, i have a 2007 ford explorer with an aftermarket warrentee. i had
leakage from under my transmition which ford dealer diagnosed as a bad
torque converter seal. after the repair and my payment which included 100
deductable and an additional 2-300 for unincluded hardware i have the same
leake the same night with less than 50 miles drivin on vehicle after repair i
brought the car back to ford where they now diagnose a bad torque
converter.. i spoke with the warrentee company supervisor who has a
bachelor in automotive technology and many years field experience and he
said ford misdiagnosed the issue and the will cover the torque converter
since it is bad but labor was already paid for on original diagnosis.( i have
pictures of the old torque converter attached). there are groves and wear
marks on the converter that i believe ford should have noticed during original
repair and then my torque converter replacement would have been covered
by warrentee on the first shop visit. i now have had my car in the shop for
over a month(April 18th original drop off, today is may 19th) and ford is
charging me $1100 to complete repair. i would like to know if this definitely
should have been caught in the first repair go around. thank you