Hey bbboy,
No need to be sorry...that's what we're here for
Yes, SBS1 = SBS HD, in the sense that SBS1 is the SD version (576i) and SBS HD is the HD version (720p). At any given time, the same programming is shown on both.
Not sure about SBS2, but presumably it is just a duplicate of SBS1 (in the same way that 7 Digital 1/2/3 are all the same as 7 Digital).
Same goes for Ten HD....both channel 1 and channel 12 are effectively the same thing.
In November last year, Ten changed from using channel 1 for SD (same as channel 10) to using it for HD (same as channel 12). The reason presumably is that as more people get TV's, Set-top Boxes, PC's etc. with HD tuners; they want to promote the HD programming more than the SD stuff (which suits me just fine
Refer to
this post for more details on the Ten changes.
The reason why I started my first reply by stating what each of the broadcasters send out is because it can get confusing when you see all of these different frequencies, channel call signs, numbers & names picked up by your channel scan.
If you start by getting your head around what the broadcasters are actually transmitting, then it becomes easier to map this against what your tuner is telling you it can pickup.