Currie 9” Rear-end

I have a question… In May 2021, I had a brand new 9” Currie Rear-end/differential installed in my 66 Barracuda, so I could install new 15” rims/tires. In less than 2500 miles since installation, all of the seals and gaskets are leaking. Is this normal?
This is just a Sunday driver; not a racer. Appreciate any input anyone has on Currie rear-ends::
Thanks