First stamp, not an error, an EFO, and a minor one at that. The stamp is also damaged.
2. The Ceylon is an absolute "cracker" nice find indeed.
I cannot see how that happened, it is from a comb perforator.
If I had seen that on eBay
, I would have been very suspect, thinking perhaps photo shopped.
The only source I can imagine, if this is genuine, is that it is "printer's waste" come on the market.