Hello,
I have it up and running, but want to test that it is working correctly.

I run

oclvanitygen -f addresses.txt -o found.txt -k lastkey.txt 000000000000000000000000000000000000000000000000000006bd3b27c500

and would expect it to find the private key to 1PiFuqGpG8yGM5v6rNHWS3TjsG6awgEGA1 almost immediately since the private key is 6bd3b27c591.

It doesn't.  It blows past that private key without logging anything.

It is likely I'm doing something wrong, but I can't see the trees from the forest right now.  Can you advise?

Thanks!