From my own Best Buy Steelbook, it appears its playlist 707 is not the same as its playlist 553 (which matches your findings).
All I was saying is that the Walmart (2-disc) #46271 playlist 707 has the same segment sequence as that of the Best Buy Steelbook #46488 playlist 553.
Walmart #46271 playlist 707 = 503,520,516,510,511,506,507,514,518,509,519,517,50 1,505,502,512,515,504,513,508
Best Buy Steelbook #46488 playlist 553 = 503,520,516,510,511,506,507,514,518,509,519,517,50 1,505,502,512,515,504,513,508
The playlist numbers are different, but the segment sequences are the same.
sorry if I confused anybody
az_raiden