When I use the numeric buttons on the remote to change channels I always have to either key in 01, 02, etc. or wait approximately 3 seconds before chosing another channel - is this default and un-changeable? The reason I ask is because I did have a rather perfect 32FQ75 previously, but that still lives with an ex , and it wasn't the default or set with that model. Also is there any way I can tell if my model is *genuinely* brand new and not one of the countless rejects I've been reading about on this site?!