Not sure why you're seeing that... When I wrote the post you quoted (10:37am ET yesterday (Friday)) the Pixel was available for order (with shipping dates ranging from Nov 22 to 3-4 weeks) in all color and storage configurations except blue (being the only ones completely unavailable for order) from Google Play. Same remains true as I check it right now.
As to 'crap availability' I suppose it's a matter of perspective. It's not what we'd want, as we always want instant gratification, but you can secure your place in line.
Now as to your orders being inexplicably cancelled, that absolutely sucks. With it having happened twice, there's got to be something causing it which Google should be able to define and resolve, regardless how uncommon an occurrence it may be. Google has a smaller inventory set aside with which to resolve DOA and otherwise defective units, and at this point they should be making an exception and fulfilling your order manually from that inventory.
I'm not lying for dramatic effect, that's what I saw late last night, seems black is back now, XL is still out... We're not a week after launch anymore, we're over a month in, and I doubt they're moving the numbers Apple are. I think they should be doing much better supply-wise... Who knows tho, maybe the Pixel IS wildly successful, happy to be wrong.
Wait times aren't getting any shorter either, still 3-4 weeks or 4-5 weeks... Could be a good sign or a bad one. At least they under promise and over deliver in that regard.
They should definitely be able to handle some FUBAR orders manually tho, but the reps seem completely unable to do so. I've spoken to supervisors, tier 2, shipping department, Wallet department, etc etc. Everyone's hands are tied, like I said, the tools their service staff have to work with are crap.
There's no reason orders should be getting automatically cancelled without first contacting the customer either, specially not weeks after being placed and as they're about to be shipped. Mine is a bit of an extreme case but a whole bunch of other orders were also auto sniped over random payment hold errors etc.
Hopefully they're selling a ton of Pixels via Verizon and keeping stock somewhat more fluid over there that on Play, I know ultimately that probably matters more. I'm desperate enough I'd probably even take the locked bootloader at this point but VZW is the only major U.S. carrier that doesn't operate down here.