My WordPress site is causing 404s

I am running:

WordPress v.4.3
Adventurous Pro v.3.2
Jetpack v3.6.1
Redirection v2.3.16
WP Gallery Custom Links v.1.10.3
WP SuperCache v.1.4.4
Yoast SEO Premium v.2.3.4

Here are a few of the 404 error codes.

/wp​/?post_type=feedback&p=706
​/wp​/frm_form_actions​/5_email_1​/
​/wp​/?post_type=feedback&p=708
​/wp​/frm_styles​/formidable-style​/
​/wp​/?safecss=safecss

My website is: http://www.parkmodelexpress.com