In freelotto Winner checklist Paid / Pending categories are shown, While I click Validation why does'nt work?

In freelotto game Paid / Pending status is showed in the winners list. But while I go for validate my claim it is always asked for Credit card no and expiry. My question is, if it is a free entry game where is the point of asking that. Another thing, in a winner checklist my name showed four times winner and kept in Pending category while against the other names it is shown Paid. My last question how they were Paid since my four won prizes are kept Pending.