Listing stated out of stock but how come someone can still order it?

[jacksonphilips]

The listing is set to 1 of the variations being out of stock - this shows on a laptop but from a mobile phone you can still order (which a customer has - so I will have to cancel and pay the fees)

https://www.ebay.co.uk/itm/166751362157

Thanks

[albertabrightalberta]

I'm seeing that only the 5' king size is OOS. Other sizes are available. Is that the size someone was able to purchase? 

[jacksonphilips]

Yes, they could purchase item 5' king size from their mobile phone.