Found my problem, for some reason I mentally removed the parentheses (pls don't ask why), so my calculations are off by 1 (each iteration). I did n - names.length - 1, instead it was n - (names.length - 1) or n - names.length + 1 if you want.

Sorry yeah, you're right. Fixing that the 21st should anyway endup on L(eonard) though:

S L P R H
SS LL PP RR HH
SSSS L(L)LL PPPP RRRE HHHH

So it doesn't change the fact that the index would go to -1.