PHP Bug Fixs for Custom CMS

Looking for a developer to fix some bugs in a Custom CMS made with PHP/Mysql Bugs outlined below. 1. Query We have a basic query to update a Business Listing that has one section that includes assigning the listing to multiple categories/websites in database. This has been working in the past but currently is very on and off and need someone to find and fix the bug. 2. Search Feature Search Feature includes search by Reseller | Region | Website | Business | Postcode. These features are working on and off at the moment depending on the combination selected, needs to be fixed. 3. Pagination Basic Pagination script working on and off needs fixing.