Sbc storage problems

I am having bother with the sbc storage items for example I wanted to put players in sbc but some cause error msgs and others don’t and today I had Kyle walker card I was using went to the sbc storage and the new one I had got went to club I did try using the sbc storage one first it didn’t work got error message so I completed it with the walker in my club it worked and now when I go to sbcs and go in i select him then i choose to send to my club but although it says he is in my club I am going to put him in my team but he is not there for me to select I then go back to sbc storage and he is back there so I am unable to use the card