to address the staking fuze/split
there are 2 lines in code that define this:
unsigned int nStakeSplitAge = 1 * 24 * 60 * 60;
int64_t nStakeCombineThreshold = 1000 * COIN;
the nStakeSplitAge = 1 * 24 * 60 * 60; means that the pos reward gets split into 2 outputs if the stake was younger than nStakeSplitAge(24 hours for STEPS)
the nStakeCombineThreshold = 1000 * COIN; means that if there are multiple sub-1000 STEPS coins at the staking address they should be recombined.
there are 2 lines in code that define this:
unsigned int nStakeSplitAge = 1 * 24 * 60 * 60;
int64_t nStakeCombineThreshold = 1000 * COIN;
the nStakeSplitAge = 1 * 24 * 60 * 60; means that the pos reward gets split into 2 outputs if the stake was younger than nStakeSplitAge(24 hours for STEPS)
the nStakeCombineThreshold = 1000 * COIN; means that if there are multiple sub-1000 STEPS coins at the staking address they should be recombined.
Given your find I assume these lines, or some with similar functionality, but perhaps different values are present for DeltaCredits as well. Since one of your examples fused inputs into one 1014 coins input I guess if you want smaller inputs these should be separated into different addresses to avoid fusing.
Yes, block 22102 now as well. 
