I have a custom post type, 'professional'. When I make a regular post grid, using its Taxonomies, I see all the posts. When I switch to a filterable grid, almost all the posts disappear. The counts on the taxonomy terms are accurate, but the number of posts that appear is much smaller. Sometimes this is due to the sort order method, but I tried all of them, and the problem persists. How can I troubleshoot this? It would be very useful if there were a debug mode that would display all filtering factors. PLEASE NOTE: I can't allow site access. I can take screenshots, but the client won't allow 3rd parties to access the site.
Also - when I set the posts per page to -1, the page never completes loading. It eventually hangs with a 503 error.