If you allow an historical game to run itself based on AI evaluations, from any point thereon the AI will begin making its own decisions which may not be historically accurate. I think, therefore, you need to look into the historical options, particularly:
- Use Real Historical Lineups (becomes available only if Use Real Historical Transactions is activated first), and
- Base Roles/Positions On (either AI Evaluation or Real Life Stats - you want the latter, of course)
When you activate the Real Historical options, you will see the game load historical databases in the background. They will contain the accurate positions for Red Schoendienst and Johnny Hopp, I bet, and they will play most of their time at these positions. There may be some shuffling still but I think your results will appear more accurate.