If you are getting unexpected search results from you commerce server web application it could be caused by your SQL Server full text catalog indexs not been rebuilt. We experienced this issue while using the CS2007 agent APIs to created/modify virtual catalogs. The last step in the process triggers the rebuild of all the indexes using this SQL:
[sql]
DECLARE @Rows int
DECLARE @Name varchar(8000)
DECLARE @FullTextCatalogs TABLE (i int IDENTITY , Name varchar(8000))
INSERT INTO @FullTextCatalogs
SELECT name
FROM [database_productcatalog].sys.fulltext_catalogs
SELECT @Rows = @@ROWCOUNT
WHILE @Rows > 0
BEGIN
Select @Name = [Name] from @FullTextCatalogs WHERE i = @Rows
EXECUTE(‘USE [database_productcatalog]; ALTER FULLTEXT CATALOG [‘ + @Name + ‘] REBUILD’)
SET @Rows = @Rows -1
END
[/sql]