Url.Action puts an & in my url, how can I solve this?

I didn’t notice yesterday that you had & I thought that was the SO editor had changed that. Try wrapping your Url.Action() in a @Html.Raw() to prevent the Encode of &.

Or alternatively only Url.Action() the controller/action bit and pass the two parameters as post data rather than directly on the url, jQuery should sort out the &’s for you that way.