Duplicates

Actually I do not know if this a real bug…. But it is indeed annoying and happened to me several times. Yesterday I opened a pack showing a duplicate Kounde. I did not post the new Kounde into the sbc storage but used my main Kounde for the Busquet sbc. I wanted to send my duplicate Kounde afterwards into my team again. However, after using one of the two Koundes in the sbc, the second one was in my sbc storage….. so actually I lost both. Did this happen to others as well?