Use the drop down feature on the upper right where it says "recent activity".  Then click on "newest".

Hard to know exacty but maybe try clearing all the filters and starting over. Sometimes you get box checked that doesn't go away.

I generally don't use any of the checkbox filters like "unviewed."  

 
Here's a test to see if any new profiles are being shown to you. Use Reset All and then sort by newest. That should give you all the newest profiles within 100 miles.  If you get results, then add in new filters one at a time to see if/when a problem occurs.  Once you get what you want, save that new search and you're good to go.  

 
Life is good

 
The Cat

Here's another  search idea which works, especially if, like me and LesterP and others, you are interested in finding the newest profiles in your searches. The top left corner of every SA screen shows the word seeking in big red letters.  It's a clickable link that takes you to a page of thumbnails grouped into categories: Featured members, New members, Members online now, Popular members, and Most recent search. I have often found new profiles there which for some reason are active on that page but have not made it onto the searchable database yet. So if you're quick to pounce, as I am, you should check it out as a routine part of your searching. You may well find some cuties there before the other guys see them! Disclaimer: I usually access SA on a windows PC. If you use a different device or app I don't know if it works the same.