Hello, sword problem.

Hello im at all new player in WOW.
I played 2 weeks (maybe more) pvp on BG's and i buy 2 swords, one of them was Offhand, and now i cant use it.. Can you explain me why and can you help me change it maybe for the same but not SoulBound Or just take it both and give me some weapon for the same GS? Because now iam stuck with 1 sword wich is useless 235 gs istead of 470..
BTW im playing Hunter, and last night sword was on me but now i have it on Mail from Support with Explanataion its cant be Equiped...
Help please!
Here is screen: https://ibb.co/hWxywo
BTW its Outland server.

Problem solved, i can use the Offhand Sword now!!! I dont know how but now its working, Thanks!