Let's say you've got the following bookmarks: 
-(folder)blah1 
-(folder)blah2 
-axx 
-bxx 
-cyy 
-dxx 
Now you search for "xxx". You get: 
-axx 
-bxx 
-dxx 
Select all the three results. Cut them. Clear the "Search" field. Paste them 
into blah1. You get: 
-(folder)blah1 
--axx 
--bxx 
--cyy 
--dxx 
-(folder)blah2 
Expected behavior: 
You should get: 
-(folder)blah1 
--axx 
--bxx 
--dxx 
-(folder)blah2 
-cyy 
 
I'll try to summarize in plain words. When you filter your bookmarks and 
attempt to perform an action upon a section among the results, the action is 
performed upon the sequence of bookmarks between the foremost and latemost of 
the selected, as if the list wasn't filtered.