The index numbers for KISS changes are on pg. 155. (BTW you do this for 10 V. 10 at +4 above your pivot, and 10 V. A at +8 over your pivot number, both above max bet numbers).
As to the other question-check out pg. 144, the section on ideal betting, he goes into some points about 'ideal' and 'real world'. Most of it lies around the fact that in a 6 deck shoe any time your count rises by 12 from your start, anywhere in the shoe you are at +2 true. (pgs. 143 and 144 on his explanation of WHY unbalanced works).
I know from a couple of private messages that Rezney recommends-when possible-splitting to two hands (at a lesser bet than the count indicates) both to help volativity and to get more money into play.
Remember, why make it more difficult than it has to be? It IS, after all Kiss-keep it simple, stupid!
Hope it helps!
-EPS