Hope it actually was in-stock for you and not just a glitch on the site when it was actually a PO. I noticed when I was considering the Topo TDK Joker 2.0 set, it said "availability: out of stock" yet it still let me add it to my cart as if I was going to purchase it. Normally, when Kit doesn't have anymore stock, it's removed from the site, so I found it odd that it was still there. It was like that for almost a week until the page had the status changed to "in stock."
Either way, congrats on hopefully not having to wait on the second batch after all.