This is how I submit.
Like I stated in e-mail I've never needed to click submit more than once on your site- or anyone elses for that matter.
Actually, last night it seemed on the url I copied, it copied an extra character like a comma, and a couple sites said the URL was not valid.
I don't recall your site having this problem though.
I think the memory in clipboard must have gotten messed up because when a couple sites stated I must put in a valid URL, I double checked it character by character and visually it looked fine.
Maybe from now on I'll just copy the link straight from the browser and onto submit pages.