Does PSA reuse flips?

I got a card on ebay that is in a psa holder. Something didnt seem right to me from the second I saw it. I understand that one of the ways to tell if a holder has been altered it to hold a light up to the back of the label. When i did this i could see that another psa label was behind the psa label for the card i bought. This has to be a sign that the holder reused, correct?
http://myworld.ebay.com/dgordo76
My current wish list:
https://forums.collectors.com/messageview.aspx?catid=27&threadid=952285&enterthread=y
Please pm me if you want to sell any of these cards.
Thanks!
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Looking for 1970 MLB Photostamps
- uncut
Positive Transactions - tennesseebanker, Ahmanfan, Donruss, Colebear, CDsNuts, rbdjr1, Downtown1974, yankeeno7, drewsef, mnolan, mrbud60, msassin, RipublicaninMass, AkbarClone, rustywilly, lsutigers1973, julen23 and nam812, plus many others...
http://myworld.ebay.com/dgordo76
My current wish list:
https://forums.collectors.com/messageview.aspx?catid=27&threadid=952285&enterthread=y
Please pm me if you want to sell any of these cards.
Thanks!
Collecting 1970s Topps baseball wax, rack and cello packs, as well as PCGS graded Half Cents, Large Cents, Two Cent pieces and Three Cent Silver pieces.