Pout your lips out, and then breathe in through them hard and quickly while shaking your head and frowing.
Hear that sound? That's my response to buying this :D
You very much have "potential" trademark issues. It's not about what is definitively listed, it's about what the definitions mean and that they include things not listed.
If they file a complaint, you can probably argue it's just a 4L biz and are popular at the moment and no intentions of anything to do with "yahoo", but I know who has more money and better legal teams...
Take a look:
https://archive.icann.org/en/udrp/Detail181.htm
https://archive.icann.org/en/udrp/Detail180.htm
Many of those are not even as similar as yours is...