My searching/work flow is the same. Go to Spotlight to search, then Show All In Finder.
Which opens a finder window showing EVERYTHING, filename,contents...
Which is poorly implemented in Lion without a FILENAME Button.
If you add a space to the finder window search, you'll get the popups option for FILENAME
Clicking the + next to Save makes you fiddle with a new search popup Type and forces you to retype the search. Not very "apple" like.
My SOLUTION today is in Spotlight to force a filename search.
name: what you want
then when you Show All in Finder, it will show only Filename in the Search window's results.
This seems easier to remember and do with a faster result.
Apple overthought the search features and it seems to not work seamlessly between Spotlight and Finder Searches. Having a FILENAME Button was the simple "Apple" solution.
It's neat you can search contents, but I suspect searching for FILENAME is Far more Common.
NOW it's harder to do.
Another idea is when the search/finder window is active try setting the finder View Options. There you can specify to sort by Date Modified, which might help sort out the newer things, from the odd older stuff.