Greetings,
Have read description, but there is no way to fix it without knowing URL at first. By the way you describe the problem it's probably something with canonical tags, urls. Something that way, but let me take a look.
I also have some client now which promised award me with same problem, but in order to verify solution it will take time, so he do not pay me;) Let's do the following, I will provide you 100% answer to that problem and if so you pay me without waiting Google to index this or so.
Let me know.
Regards,
Alexander