Troubleshooting 404s and Redirections
Redirected to Homepage for non-admins
Estimates and Invoices with the status of "Temp" will redirect non-admins to the homepage. Fix this by updating the status to "Pending" if yet unpaid/accepted.
404 Page (plus Redirection plugin)
When viewing some estimates and invoices you're may be redirected to a 404 or the homepage if you're using the Redirection plugin. The cause of this is a setting called "Monitor changes to posts", set this to not monitor changed posts and the bad redirects should be fixed.