Thanks for the 1 up.
Yes, you can sort as many as you wish. However, the more items being sorted, the less of performance you will get in your website navigation, and certainly that is not only applied with the use of Isotope (it's not cool to have hundreds or thousands of items in one page in any situation).
I said "my first version" exactly due to that... I would have hundreds of products at the end, and when I added almost 100, it already begun to freeze the user experience, so I decided to drop that "all in one page" layout.
I intend to post my video until friday