smart group wrong


i have a smart group in the sidebar and in my inbox. it is the same smart group, and includes all documents but groups and smart groups. the one in my side bar says i have 127,000 documents, the one in my inbox says i have 104,000 documents. I have selected them both and highlighted all documents to see if the count changes. it does not. any ideas why this may be?

By default smart groups in the sidebar search in all databases (including the inbox) but the smart group in your inbox searches only in the inbox.