It's a bit difficult trying to work out exactly what the problem is. I can't remember if when I configured my HubPages Adsense settings if my publisher ID appeared on its own after the association between HubPages and my Adsense account was approved, or if I had to insert my publisher id myself (insert into the HubPages account settings.)
Are you certain that your Adsense publisher ID is different to the one appearing in your HubPages settings? Check in your Adsense account what your publisher ID is.
Is this the first time you're applying for an Adsense account? If you have already applied for Adsense before, you'll be using the same publisher ID associated with your Adsense account the first time you applied. You only need one Adsense account no matter how many pages or different sites you have ads on.
It is normal for HubPages to still have your configuration under review if your Adsense account has not yet been associated with your HubPages account, but seeing a different publisher ID in the place on HubPages where your own publisher ID should be sounds unusual and I'm sorry I cannot be of more assistance. If you cannot sort it out, I suggest contacting HubPages for further help.