One thing that I noticed that often needs to be done is that you need to go into:

Tools -> Store Manager >>

and Select:

Update ALL Products Price Sorter

This index apparently does not get updated when you upload price changes.

There is a BUG in the upload. You will have to read through the entire thread (sorry) but there are some fields that when left blank, pull the data from the last imported item that wasn't blank instead of properly reseting it.

I don't remember where that was! Sorry. But I believe dates was one of them. Best to eliminate a column that you are not changing when uploading. Also makes uploading changes faster ->>> less data to process.

-chaddro.