theme development - Form Submitting Error with get_template_part() in WordPress

I know you say it'st ance issue, but it clearly is. Thattice is the default 'Thisnce didn check out' message. I don know exactly why thence is failing, but that is what is happening.

I would double check how yournces are created and checked. If you're using wp_nonce_field() make sure both action values and argument values are the same. Also, double check spelling of variables, or any scope-related issues that could be causing thence to fail.

EDIT

Following up on your insistence that it'st ance issue (which it is. Thence issue is caused by a scope issue), here's what's probably happened. Included/required files are executed in the scope in which they're included. My guess is you're using a variable to build either thence action or thence name. Because get_template_part() includes the template file in the scope of that function, it's longer being executed in the scope of your admin page's display callback. You either need to globalize those variables in all locations, or you need to use constants instead of variables.