Chrome loading script twice when manually typing url to move to next page

I am having a bizarre issue that I’m thinking may be a Chrome bug or possibly a bug with Visual Studio. My script is getting loaded twice. To verify the issue I created a test script that sets a cookie with a timestamp to show the code is getting appended twice. If I navigate to the page via a hyperlink it works fine. Also if I hit the back and forth buttons it also works fine — but if I manually type the url for the second page in the browser it calls the script twice.

Disabled button with a alert is clickable in IE8 (browser compatibility Issue in Asp.net website)

I have disabled a link button and image button(which is inside a link button so that I can show a Alert) and it works fine in Chrome, but when I open it in IE8 the image is disabled but when i click it it shows the popup(‘Are you sure you want to delete this User?’). Why am I getting this error in IE8 and IE7, how can I fix this.