That's because those are generic bikes they slapped on some fancy sounding name to. With those generic brands if you ever have a warranty issue good luck in getting it resolved, at least with a major brand they have much more control over the quality and you have the support of a major company to go to should there ever be a problem. That is why that website I went to for bikes that are sold in the Philippines had so many brands I've never heard of because they were all generic bikes with decals of made up companies. And because of where you live you have to be really careful of bootleg products, these are products with big expensive names like Colnago that have all the right decals, and the frames look similar but they were made in China and not under license to be made by Colnago or whoever, and sold for cheap to the unsuspecting fool thinking they're getting the real deal.