My boyfriend put my name on his credit card..do I get my own online account?

My boyfriend and I are 19 and i get denied to every credit card i apply for due to "lack of credit history" because I have never had a credit card before. My boyfriend had the same problem until one day he got lucky and got a capitol one credit card. His mom said if he adds me to his card I will get my own card and it will help build my credit also so I can get my own card eventually. So he added me and I got a card in the mail but they have the same exact numbers on them so when I go to his online account, I can't figure out how to make it so we can see what he used his card for and what I used my card for, its just like we only have one card. I havent used my card yet, if that may be the problem, but I want to be able to see the cards separately. Also, he got an email saying he could get any picture uploaded to his card for free, so we went through our pictures and found one of our dog to put on there..will that be on only his card or both of ours? Because once again, online it looks like we only have one card, so we couldnt choose to put the image on one card, and not the other.Im hoping this will fix once I use my card, but am not sure..thanks for the help!