I like it this way. And unless I misunderstood it, it's really quite simple.
The knives you see listed at the store are the knives that Skunk has lying around in his vault of INFI - that is to say, they are knives that have not been yet ordered by anyone, they haven't been shipped out, they are there, waiting to be ordered. Now, if the knife has an availability of "empty trough", that means Skunk has them in his vault, BUT someone (probably more than one person) is holding all of it in their cart(s) - maybe because they're going to buy them in 2 seconds, or maybe because they're being cart hogs for the hell of it. So, keep F5ing until they either order them all and the knife disappears from the order here page, or they get thrown back from the cart and are available again. If the availability says "low inventory" or "in stock", that means Skunk has them in his vault, and nobody has even carted all of them yet.
That's the way I figured it works, anyway. I could be wrong.
We'll still have to go between pages, as before, if there is so much stuff it takes more than one page to list it.