First of all FYI. They have somewhat fixed this bug and the information was wrong on how to do it. This was the correct way to have claimed many rewards.
1) You had to have played long enough to get a reward
2) You will get a box saying that you can get a reward on your screen. Choose "Claim reward now"
3) This will open up a screen that will show many items that you can claim as yours. *DO NOT PICK ITEM YET*
4) With that window open. Type /claim and not /getvet. All /getvet is, is a way to see how long you have been playing.
5) Now that you typed that. It brought up another window of items. *DO NOT PICK ITEM YET* If you pick a item. You can not clone item window anymore. So stockpile up as many windows as you want before you start claiming.
6) Once you have all your windows you want open. Pick the items you want.
****UPDATE*****
That was how you did it. The windows still show up but the problem is once you pick your item. Your done. You click the next window and it just goes away.
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But maybe someone can be lucky and bug their way through. So wanted to post the correct way of doing this.
GL