products with attributes set to zero

I set a product attribute qty. to zero because I was out of stock. A customer somehow was still able to place an order for that particular size of the item. Any ideas why? Also, it now displays that there are -1 of that item, seems a little strange.

Thanks for the help.

A customer somehow was still able to place an order for that particular size of the item. Any ideas why?
What are your settings in
admin > config > stock

true
Subtract stock true
Allow Checkout true
Mark product out of stock ***
Stock Re-order level 5
Show available stock level in cart when less than order true
Display Images in Admin false
Products status in Catalog when out of stock should be set to 0
Show Sold Out Image in place of Add to Cart 1
Product Quantity Decimals 0
Show Shopping Cart - Delete Checkboxes or Delete Button 3
Show Shopping Cart - Update Cart Button Location 3
Show New Products on empty Shopping Cart Page 1
Show Featured Products on empty Shopping Cart Page 2
Show Special Products on empty Shopping Cart Page 3
Show Upcoming Products on empty Shopping Cart Page 4
Show Notice of Combining Shopping Cart on Login 1

Allow Checkout true
Set to false

Great, thank you

Hello, I have a similar problem, but I already have my Checkout set to false. I can still successfully place orders for items that I have marked as 0 quantity in the Stock by Attributes area (Catalog > Products with Attributes Stock). I have tried both deleting the zero-quantity listings and just typing "0" in for quantity and it seems to not make a difference. Here are my current settings for the admin > config > stock area:

Check stock level true
Subtract stock true
Allow Checkout false
Mark product out of stock ***
Stock Re-order level 5
Show available stock level in cart when less than order true
Display Images in Admin false
Products status in Catalog when out of stock should be set to 1
Show Sold Out Image in place of Add to Cart 1
Product Quantity Decimals 0
Show Shopping Cart - Delete Checkboxes or Delete Button 3
Show Shopping Cart - Update Cart Button Location 3
Show New Products on empty Shopping Cart Page 1
Show Featured Products on empty Shopping Cart Page 2
Show Special Products on empty Shopping Cart Page 3
Show Upcoming Products on empty Shopping Cart Page 4
Show Notice of Combining Shopping Cart on Login 1

3Apples,
Fully a different issue and deserves your own post versus hijacking anothers that deals with default code as you have 3rd party code

Stock by Attributes area
Where there exists a support threasd devoted to it and it's issues
http://www.zen-cart.com/forum/showthread.php?t=47180

or for ver 5.0
http://www.zen-cart.com/forum/showthread.php?t=166928

kobra:

3Apples,
Fully a different issue and deserves your own post versus hijacking anothers that deals with default code as you have 3rd party code

Where there exists a support threasd devoted to it and it's issues
http://www.zen-cart.com/forum/showthread.php?t=47180

or for ver 5.0
http://www.zen-cart.com/forum/showthread.php?t=166928

Thanks for the links, and sorry, I've only made thirteen posts here in 2+ years of mostly lurking. This was the closest thread I could find with the search engine, and usually I've been able to find solutions to every single other problem on my own. Sorry for being a bother. Didn't realize how bad it was to not start a new thread. :(