I don't have (nor to I plan to invest in) an HD Radio but I was looking at a list of DFW stations and I am confused by something. For example, in Houston, KHJZ HD-1 is Smooth Jazz and KHJZ HD-2 is Trditional Jazz. However, in DFW KMVK (MOViN') is HD-1 and KMVK HD-2 is listed as Traditional Jazz but it is playing the Online Oasis (Smooth Jazz). Up the dial at 100.3 KJKK HD-1 is Jack and KJKK HD-2 is also Jack. If anyone has an HD radio can you tell me what the difference is in Jack 1 & 2 and what is the need for two? ???