It seems to be multiplying... On my HwS, Eastern Arc (all 3 satellites), it's currently on channel 102, 115 twice, 207 twice, and 402 twice. The ones that are listed twice on one channel are both listed as HD, rather than one SD and one HD as you'd expect.
Okay, I found it in an uplink report from 8/29. They are both native to those channel numbers
and being mapped down from four-digit channel numbers to those channels:
New Uplinks / Mappings – Channels Available
115 STDIO DISH Studio Channel added to 119° TP 14 (SD Hidden)
AVAILABLE
115 STDIO DISH Studio Channel added to 72.7° TP 12 (HD Hidden)
AVAILABLE EPG linked to 72.7° TP 12 Ch 9973
207 STDIO DISH Studio Channel added to 119° TP 14 (SD Hidden)
AVAILABLE
207 STDIO DISH Studio Channel added to 72.7° TP 12 (HD Hidden)
AVAILABLE EPG linked to 72.7° TP 12 Ch 9973
402 STDIO DISH Studio Channel added to 119° TP 14 (SD Hidden)
AVAILABLE
402 STDIO DISH Studio Channel added to 72.7° TP 12 (HD Hidden)
AVAILABLE EPG linked to 72.7° TP 12 Ch 9973
...
9973 STDIO (115 HD) DISH Studio Channel added to 129° TP 24 (HD Hidden)
AVAILABLE
9973 STDIO (115 HD) DISH Studio Channel added to 72.7° TP 12 (HD Hidden)
AVAILABLE
9974 STDIO (207 HD) DISH Studio Channel added to 129° TP 24 (HD Hidden)
AVAILABLE
9974 STDIO (207 HD) DISH Studio Channel added to 72.7° TP 12 (HD Hidden)
AVAILABLE
9975 STDIO (402 HD) DISH Studio Channel added to 129° TP 24 (HD Hidden)
AVAILABLE
9975 STDIO (402 HD) DISH Studio Channel added to 72.7° TP 12 (HD Hidden)
AVAILABLE