Checkbox Vs Text Box

I have a form with multiple records.

My intention is to have the user click a checkbox for each product he wants.
Then submit the form placing multiple items in his cart.

If I use a text box like the following and enter a 1 for each product,
submit, no problem.

The user gets the products he wants.
<input name="qty" type="text" value="0">

However, if I use the following checkbox code, and assuming the user checks
4 products half way down the page, he will get the first 4 products in the
recordset. If he clicks 1 checkbox, he will always get the first product,
not the product he chose. <input name="qty" type="checkbox" value="1">

What I have found is when I submit the form to a blank test page using
checkoxes or text boxes, there's a considerable difference. The text boxes
deliver a comma delimination for each occurance. The checkboxes only offer
comma delimination for each checkbox that is selected. At this point, I'm
assuming that's the difference between the two and it cannot be changed
through HTML.