Can someone explain DropCatch to me

I am using then some time now and so far few times domain I try to catch went to auction when as there were more peope try to catch it and some times I got notice that domain was not successsfuly catched by DropCatch...

Today I try to catch domain Itkv.com.... it still stends in my Backorders but when I click on it I se following:
- DropCatch.com Caught This Domain
- I see NameBright is domain registered to now.

Can someone explain this situation to me? Thanks in advance!