Go to isnare.com. They have submision service
From my experience NOT too short is better. Too long URL is may definite as a spam keywords on domain.
Are you sure you are listed for this keywords? I think it's not hard to got position under 300.
I think it's not a problem. I think your competitor may do better SEOs for them website. have you already test with site:http://www.your-stie.com...
I have got this message in the past too. Please beware. You should login to paypal to check everything by not click from email.
I think it's google system help us to easy to find results we want.
Separate names with a comma.