https://www.rugbyleagueproject.org/seasons/nswrl-1990/round-5/canterbury-bankstown-bulldogs-vs-cronulla-sutherland-sharks/summary.html
You have listed that the scrums were won by Cronulla 6-4. They were won by Canterbury 6-4.
An hours highlights of the game is here:
https://www.youtube.com/watch?v=9hlLjui0QSU
at 43:30 they give the scrums & penalties at the time & Canterbury were leading 5-2, so Canterbury have already exceeded the 4 you have listed. AFLTables has it as Canterbury 6-4. as well.
https://afltables.com/rl/scorers/games/1990/199004150607.html
It's also what is in Middo's annual.
Thanks Ted.
We sourced most of the scrum & penalty data from the AFL Tables I found sometime ago that they are mostly wrong through the late 80's & 90's for some reason so I've been changing them as I update details on games.
The exact tallies are not always accurate between sources in this game for example Big League has scrums to Canterbury 8-3 & penalties 13-11 to Cronulla but Middleton's Yearbook as you say scrums 6-4 to Canterbury & penalties 12-11 to Cronulla.
I generally put the Big League tallies in RLP.
I have been having some computer issues, so doing so catching up. OK, just so you realise that Cronulla did win at least 4 scrums according to the footage. It was a 1-hour replay & some footage edited out.
OK I'll revert to the Yearbook tally, I'll use the Yearbook tallies from now on.