It looks like the Thunderwolves are a Space Wolf unit that adds each model individually? So for a unit of 5 models, you'd have 5 child units listed within Army Builder, each of which had their weapons set separately?
For that sort of unit, there simply isn't enough space on the card - as you can see from the image, each model takes up over 1/3 of the card by itself. One way you could fit them all in would be for you to combine two of the Thunderwolves into a single "child unit" of 2 models with the same weaponary - that way there should be just enough space to show 3 models. Unfortunately that doesn't work if they're all armed differently, though.
Hope this helps!