Lvl 26 banner on lvl 10 rogue?

Today I've seen rogue lvl 10 with banner which was rewarded for reaching 26th level.. How is this possible?

Banners can be swapped between toon through the stash. So a higher lvl toon capped to 26 and gave banner to his 10 toon...

I did that once to my twink I got loads of pms eg: "how did you get a banner!!!" etc lols

Yes that mage is right :)