Marks not showing up in a search?

[+jef]

Here's a search for all marks within a mile of my house:

 

http://www.geocaching.com/mark/nearest.asp?lat_ns=N&lat_h=37&lat_mmss=52.913&long_ew=W&long_h=122&long_mmss=17.714&dist=1

 

Here are two marks that used to show up in this search and now do not:

 

http://www.geocaching.com/mark/details.asp?PID=HT0968

http://www.geocaching.com/mark/details.asp?PID=HT2845

 

By my calculations these are respectively 0.22 and 0.53 miles from my house. I know they used to show up in the search because that's how I found them back in May when I logged them both.

 

Whassup?