I left the column splice as the default 48".
The highlighted column above has one column going from Base Level to 48" above Low Roof Level plus the second column from 2" above Low Roof to 48" above Low Roof.
The other columns are split at 48" above each level if there's room. (One line is at 20" not 48")
If I switch the splice to 0", I get rid of the doubled-up column and all the columns are spliced at each level. Is there any way to eliminate the splices entirely? If I "fix" that in Revit I assume it would ruin the round-trip to RAM.