Running Off two sets of Hi-Opt II indices with S.B.A. I expected to see differences between the two ~ both are for 2 deckers but one is a S17 NDAS game and the other is H17 DAS. Naturally the indices involving pair splitting and dealer's holdings of Ace or Six are radically different in spots; yet there are a few different departure index numbers that have me befuddled. Any feedback is very much appreciated.

This one completely confuses me:
8-8 vs. dealer TEN is listed as +4 for S17 and -6 for H17

Ignoring the smallest indexed differences, I am wondering about the following:

Soft 18 vs. dealer Ace is listed as 0 for S17 and NOT listed at all for H17
Soft 18 vs. dealer 2 is listed as +3 for S17 and listed at +5 for H17
Soft 15 vs. dealer 5 is listed as -4 for S17 and -6 for H 17