Blizzard have announced there is a fix coming to address the issue that certain BoE items have been spawning without any level requirements.

BoE (Source)

We’ve discovered a bug causing the creation of some Bind-on-Equip items that lack a level requirement. We’re working to quickly hotfix the issue so that no more new BOE items like that are created. We will then make adjustments to existing, affected items.

We apologize for the inconvenience. Thank you!