The values are for different things; @INROWNUM is for the current row number coming into a transform stage for a link and @OUTROWNUM is the current row number going out of a transform stage down a given link. They can be identical but are not necessarily so.
Primary input stream has --> @INROWNUM
Each output stream has --> @OUTROWNUM
Kenneth Bland
Rank: Sempai
Belt: First degree black
Fight name: Captain Hook
Signature knockout: right upper cut followed by left hook
Signature submission: Crucifix combined with leg triangle