Problem with a couple of heirlooms

Hi, guys. Here Funkadelic, i'm relatively new in Warmane and MoP itself. The thing is: i was farming ranks with Brawl'gar Arena in order to buy 2 Fist weapon heirlooms for my new character. To be able to buy them you need Rank 8, all fine, finally i bought 2 Brawler's Razor Claw (1-80 heirloom) and then upgrade them to Brawler's Bladed Claw (1-85 version). But i can't equip them with my lvl 1 monk cause the item says it requires Rank 8 for equip it too, but ¿That make sense? I mean, those weapons are heirlooms, items designed for lvl'ing purposes, i'm confused ¿Are this heirlooms working as intended and they're just useless? If not, please, help me. Equip them in my monk, Parliament, or remove the requirement part, idk, something ¿Or i need to do something before to be able to use them with my low characters? Anyway, thanks for your time.

http://i64.tinypic.com/3163zfs.jpg

http://i68.tinypic.com/2w6vv6f.jpg

http://i65.tinypic.com/k54uba.jpg