I bought a SSS from Merlin and had a shop replace it but was still getting fluid on my floor. I took it back, they confirmed it's definitely the source of the leak and cleaned it off / put it back in. It's still leaking so I guess it's my turn, next.

What's the likelihood that I got a bad seal? Maybe they installed it with the "bowl" pointing the wrong direction - or is it "too obvious" which way it goes?

All advice welcome!