It sounds like that if a buyer were to go and buy silver futures, say a hundred 1000 ounce contracts (not sure if the standard contract is that size or not) and then instead of selling the contracts when they come due actually asking for physical delivery of the silver their personal vault somewhere, then COMEX is buying them out way above market price so that they do not have to deliver physical silver.
This makes it seem that COMEX doesn’t really have all the silver they say they do to cover all the contracts they sell, which means they are overselling a commodity in order to keep the price down. Or something.
That's correct IF the story is true. Lots of secrecy and misinformation concerning the precious metals markets these days from ALL sides.