Add functionality to a Wordpress site with a custom directory feature

I have a Wordpress website that we recently added a custom membership directory to that we need a bug fixed and a few adjustments. This directory features practitioners and doctors and clinics for a specific community. The purpose is to advertise their services to others. There are 3 levels of membership: Featured, Professional and Basic. Featured members pay the most and always appear first in listings, wether filtered or not. Professional show up after, then basic last (free membership). BUG: The results of the directory (whether you have chosen to filter or not) are showing up strangely with the pagination. On page 1, only 8 show up, then each subsequent page shows 1 row of 4. Ideally it should show 20 per page, and it must show all of the top tier members (Featured) first - then, all of the second tier (Professional), then the remaining listings will be the lowest tier (Basic). The overflow of each tier should move to the next page before a lower tier listing can show up. For example: if there are 20 listings per page, and 32 Featured members, 10 Professional and 30 Basic... Page 1 would have 20 Featured Members, Page 2 would have 12 Featured, then 8 Professional, Page 3 would have 2 Professional, then 18 Basic, Page 4 would then have the remaining 12 Basic. NEW FEATURES: 1) Add an option of letting the user decide to show more/less per page: 12, 24, 36, 48, etc (via dropdown) 2) Add a filter by location: first country, then an option, depending on country, to further filter by the city, state/province (or zip/postal code) and max distance (miles/kilometers) 3) Add an option to let them sort by: Newest to Oldest, Oldest to Newest, Alphabetically Ascending, Alphabetically Descending. Note: even when sorting, it must maintain the order of membership levels, Top tier first, Second tier next, then lowest tier. 4) Add a keyword search box (on the left sidebar in the filtering section, first filter item, to search all aspects of member’s profiles) 5) Adjust the reviews stars, so that if there have been no reviews for a user, nothing shows up versus just 1 star (that looks unfavorable) 6) Only show filters in the sidebar if the option would yield results I can provide any designs needed. If this goes well there will be more features we will want to add soon, so would like to find someone we can keep working with! Please message me for further details and questions. Thank you!