Rear window seal

[bvb69C10]

I recently purchased a rear window seal for my 1972 c10 from Steele Rubber. I also bought new glass from a local auto glass company. The company I bought the glass from installed the window yesterday using the string trick to install it and the seal looks like crap on the outside of the window. It sticks out at the bottom about a 1/4 inch from the cab in one corner and isn't really completely flush to the cab at all in most areas. So does any one have any experience with Steele rubber? Should I try a different seal? Any suggestions of which seal from anyone who's had success? The old seal which was probably OEM fit great. It's a leak waiting to happen at this point. Any help would be appreciated.