Did that to me just a few mins ago. Told me to log in and after I did, I clicked back into the store and clicked the 5500 and the option of the 14500 came back up.
I seen it as starting from the beginning and ending the toon's story at the end of eternal throne as the peacekeeper. From there I just continue on to the alts and complete their stories. I'm not much of a pvper so I just do the story lines.