I seek your advice because I have received a warning by AdSense:
Google AdSense: You have 3 working days to make changes to your site:

Violation explanation: FORMAT MIMICKING see Ad placement policies - AdSense Help

2 weeks before they sent me warning for the same site:

Violation explanation:
LAYOUT ENCOURAGES ACCIDENTAL CLICKS and MODIFIED AD BEHAVIOR - http://support.google.com/adsense/bin/answer.py?

I am not aware of having done anything wrong ... The sample URL where the policy violation occurred is
PHP Code:
Actually, this is an error message which occurs when there is an invalid URL entered in the surfbar of my proxy usaproxyserver.info. When that happens you are being sent back to the home page of my proxy.

When I received the first message by the Adsense team I appealed and never heard back from Google. Ad serving was not disabled. Now, after the 2nd message (has a different policy violation reason) I made some slight changes to the ads around the surfbar where visitors enter the address of the website they want to visit my means of the proxy.

1. Do you have any idea what's wrong with the layout of usaproxyserver.info? What could be seen as FORMAT MIMICKING?
2. What (else) would you do if you were in my shoes?

Attached an image of the surfbar neighborhood before the change I made last night.