Duplicate credit reporting

paid off a Wells Fargo credit card in full back in November 2006. It had been referred to Hilco receivables credit agency so I paid them. Hilco reported on my credit as paid in full, but recently (June 08) I noticed that it was reported again by Hilco receivables, but this time it said that the delinquency date of reporting was in February 2007. I don't understand what this is. If I paid it in full in November 2006 why are they reporting a delinquency date of 2/07? So now I have Wells Fargo (original debt) and 2 Hilco reports on my credit. I should have only 1 from Hilco stating that it was paid in full on 11/07 right? I have another bank credit card with 0 balance of a $1,500 limit, a new BMW and a good job that I have been on for 2 years with a major company, yet my score is now 610. lower than it was at the beginning of this year. I want to buy a house that I am looking at but I am concerned about my credit score. I want to call Hilco but will the call be considered an activity where I will be given 7 more years from the activity date?
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Dispute that account with the bureaus.
Say not mine or a illagal duplicate of a past paid account
then
validate the acount in writing by creditfied delivery mail to Hilco. Explain you plan to follow all your rights by law under the FCRA and have disputed this account with the bureaus for the suit which will follow this plainly illegal activity. If this is not resolved within 30 - 35 days file compliant with state attorney general, then go to court with the documented finding from these two letters.