Why is my Burn down chart burning down at the second column?

[Gestor MaisVida]

Hello, 

I have two boards in the same project and the same sprint, the first board is the "Dev team board" and the second one is the "QA team board". Cards can transit from "Dev Tam board" to "QA team Board", but when QA team board move the card from "To test" to "Testing" my Burn Down chart is burning down. "Testing column" is not the very right column but the next after first one, and there are more two columns after that. 

So is that a jira bug or am I doing some thing wrong?