How can I fix the top overlap seam on my vinyl pool, it's about ready to make it's debute on Americas funniest home videos... I'm draining it now, but want to fix it

Hi! Hezworld77, and Welcome to AMHD :)

As a pool owner, you know of dedicated pool stores in your area?

Go there, explain your situation, and ask for a vinyl repair kit.

If your lucky, they will have larger pieces of patch that comes with the regular kit.
If not ask if they have any scrap pieces.

Follow the instructions, wait till it dries, put your coping back on, and then the top rail and your done.

Just watch the adhesive, it can get messy, unless they changed the formula.
Good stuff, You can even repair holes or tears underwater

Here's at Ace Hdw:
Vinyl Pool Repair Kit (245) - Pool Maintenance Equipment - Ace Hardware

K