If you want to place the same campaign URL to different creatives - you should add a static parameter (campaign token) for every creative you want to add.
E.G. you want to add three banners. You can set it on the first step of campaign creation process. The settings will look like this:

Once you’ve the link ready for putting to your traffic source’s banner - you can just change the token value to b2, b3, b4 (according to the number of creative) and place it on it, so your links will look like this:
http://jamr.adsb4all.com/c/55c82c289a0a14cb?banner=b1 - for 1st banner
http://jamr.adsb4all.com/c/55c82c289a0a14cb?banner=b2 - for 2nd banner
http://jamr.adsb4all.com/c/55c82c289a0a14cb?banner=b3 - for 3rd banner
and so on.
Then when you want to check the statistics from these banners, just move to Statistics section and set report like this: 

And you can also apply filters by clicking on this sign