No worries. I have two plasma screens, one Samsung and One Panasonic, and neither of them output DD sound via an HDMI input. Only if I were to use an over the air antennae. I don't know why there is that limit but there is. Maybe your TV is capable of outputting DD from an HDMI input? If you bought from a place like Best Buy the salesman may not have been accurate. I find they tend to not understand some of the details, unfortunately they aren't always willing to admit that and give out bad info.
I know that some soundbars have HDMI In and out, so if that's the case with yours you could always go that option.
I'll test different combinations out for the right set-up. Thanks for the info.