Freshly rebuilt 700R4- Leaking Input Shaft Seal

[Dakota Kid]

Just had my 700R4 rebuilt by a local shop. I pulled and installed the tranny, not fun at all in my book. I haven't driven it ten miles yet. Didn't have leak until today, I warmed it up and was going to take it to the trans shop to make sure my TV cable adjustments are OK. I noticed a small puddle, and after taking the flywheel cover off, it looks like the input seal is leaking. What could have happened?? I slid the convertor on, made sure it was seated. It rotated freely when not bolted to the flywheel. I wondering what I should do, a brand new seal shoulnd't be leaking, and I don't think I could have screwed anything up. Suggestions?? Thanks

DK