Using Windows 7 and LR 5 when I look at the Keyword List a certain keyword has 7 pictures but when I check the Library Filter with that keyword 350 pictures are shown which includes the 7 pictures that have the keyword. Why does the Library Filter showi

Question

Using Windows 7 and LR 5,  when I look at the Keyword List a certain keyword has 7 pictures but when I check the Library Filter with that keyword 350 pictures are shown which includes the 7 pictures that have the keyword.  Why does the Library Filter showing pictures that do not match the query

Answer 1

Dan,
Here's what's going on in the catalog you sent me, "Joel & Caitlin's Wedding".  There is the keyword "gwenn", which is explicitly assigned to 7 pics. But keyword "schwartz" has a number of synonyms, including "gwenn", and it is assigned to 25 pics.  There is no overlap between the two sets of pics. 
I discovered these two occurrences by doing Metadata > Export Keywords, opening the exported file in an editor, and then searching for "gwenn".  I found two occurrences of "gwenn":
gwenn
schwartz
    {gwenn}
From this, you can see that the keyword "schwartz" has 9 synonyms, of which "gwenn" is one.
The filter criterion "Keywords Contain gwenn" will match the 7 pics that are explicitly assigned the keyword "gwenn", and it will also match the 25 pics assigned the keyword "schwartz", because that keyword has a synonym "gwenn".
This illustrates the behavior I mentioned above: The criterion "Keywords contains x" will match against any of a pic's assigned keywords, any of those keywords' ancestor keywords, and any of the synonyms of the assigned keywords and their ancestors.
So LR is operating correctly here, if not in a way that's easy to understand. 
It appears that you are using the synonyms of "schwartz" to represent individual members of the Schwartz family.  A better way of representing family relationships is to have a parent keyword "Schwartz", with subkeywords for each family member, e.g. "Gwenn Schwartz", "Joe Schwartz", "Jane Schwartz", etc.  Repeating the family name in the subkeywords has a couple of advantages. LR usually only displays the "leaf" name of a keyword, so instead of showing you just "Joe", it will show you "Joe Schwartz", helpful when there are a number of different people whose first name is "Joe".  Also, if you ever export your pics to other software, it may not understand the LR hierarchy and won't show the parent keywords, so again it's more informative to see a keyword named "Joe Schwartz" rather than "Joe".