Seem to have "lost" my products

I am still in the "learning" phase of working with Hikashop. I am in the process of loading products in my system. I have been setting up my product listing by maintaining and updating an excel spreadsheet of product information. I have been periodically deleting the products from the product listing in the system and then just re-importing the product info from excel. No problem so far. Both front-end and back-end category listings are great and are listing out my evolving products. Then this last time I made additional updates to the product descriptions in the excel file and I decided to not delete the products in the system but just re-import the updated excel file and let it update the descriptions, etc. for the existing products. (I made sure the radio button "Update products information if the product_code already exists" was set to Yes.)

The message I got after the import said that it didn't add any new products because they were already there. So far so good, but now I don't see any products in my category listing! I can find them through search, but they are not listed in any category in the admin section and they are no longer in my front-end category listing.

Help! Somehow it looks like my category assignment on my products was broken and I can't seem to find them on any listing other than search. Any way to see a list regardless of category so I can delete them and/or update the category manually?

Thanks -
John

Thanks Nicolas for the quick response. - I could not view the products even with the expanded filter on the product listing so I ended up deleting the records and just re-importing the excel file. It looks fine now. I still don't know why it happened. If it happens again I will export the table data before and after I re-import and see if I can see any differences.

Thanks,
John