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Is Fingerhut the only installment loan you have? If yes, the it's normal (in fact, I'm surprised you didn't get more of a drop). FICO likes you to have a mix of credit and rewards you for having an installment loan in addition to your revolving credit.
However... I've never had a Fingerhut account, but it seems to me I've read that after you make your first purchase with them and then finish paying the loan off in installments, it converts to revolving credit. If that's true, then making another purchase using that account might not give you back those points. But I don't know that for certain.