You are likely getting unexpected results due to your query string. I would recommend getting familiar with the following:
- List of WordPress Query
Variables - WordPress function:
get_query_var($var); - List of WordPress Reserved
Terms.
Reserved Terms
Avoiding the following reserved terms is particularly important if you
are passing the term through the$_GETor$_POSTarray. Doing so can
cause WordPress to respond with a 404 error without any other hint or
explanation.
Click the link for WordPress Reserved Terms to see the complete list of terms.
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