I submitted a bug report to support. Got a generic reply back:
"There is no problem with the JTF Bundle Itself, in general, the ability to use and unlock Mounts will be unlocked if a char reaches Lv. 10. Which, in the most cases, is when this char had completed the starting planet. After level 10, he can drive a mount and so, also use the unlock items."
So I re-submitted with a screenshot of their own page! *sigh* We'll see if they do something about it this time...