1. I've never heard or read Bellamy state that he physically makes his JCH films in his basement.
2. There are plenty of rebranded films being sold out there without people accusing the companies who sell those film types of being dishonest.
3. Selling products under a brand, which are NOT manufactured in the brand's facilities but by third parties is extremely common, be that film, cameras, electronics, food, vehicle spare parts, whatever. If you didn't know that, sorry to disappoint you. In many cases, you may never know who actually manufactured the product, or you may find that out by doing your research if you care that much. Most reasonable people see no dishonesty in that.