404 in Confirmation page

Greetings

I have started using the Gravity form and i have made my first form and I have some problems.

First problem is this:
In the Confirmation page, in all three possible option ( Text, Page, Redirect), i am getting a strange link with an 404 error!
the link of the page i take is this: http://www.mysite.com/:/
in all possible option, same result! 404 with this strange, wrong link!

the other problem i have is because the notification email are sending automaticly.
i have to notifications email. i want the one to sent automaticly but the other, when i want.

how to do this?
any help?

sorry, my english is not good, you can easily see that...

yes, i have installed a seo plugin, i will check by de-active it.
for now, i found a solution here, in documantation, in this link: http://www.gravityhelp.com/documentation/page/Gform_confirmation

for the second part of my question, my english dont help me to express my self as i want, so, be pattiance...

well, i have two email notification.
the first, i want to sent the first live, in the moment i receive the form.
with this submition, i create a post, in draft mode.

after the checking of the post and if i accept the publish of this post, only then, i want to sent the secont notification form.

this is my question.
automated email one notification, in the time of fom submition and the other, i want to send it, when i am ready.

sorry again for my english...