CA (Collections Agency) posted the sold account on my report

I just pulled my report and saw that the CA (Collections Agency) posted the sold account on my report. Is it legal for the original debtor, AND the collections agency post the same debt on my account? Can I get one or the other removed? AND, can they repost it again and again, even if I dont contest it? I heard that after 7 years after the "ORIGINAL" account was posted, that it has to be removed and the CA cant repost it over and over and over.... Please shed a light on this subject via email, and on your site... if I overlooked it on your site, I apologize
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i have a great groups for legality about collections
send this msg herehttp://finance.groups.yahoo.com/group/credit-repair/

i think you have to have a yahoo account
emails i get, say send questions herecredit-repair@yahoogroups.com say bo sent you for legal advice what i would say is no it is not legal

how to stop it i do not know other than disputing, negotiation and paying each off
and debt validation i do know that if it is a collection
AND you do pay

after about 3 - 6 months dispute it and it will probably fall off