This bug and the Bug [ ]: Library strange display interaction with duplicate games in collection #3 both suffer from doing actions on the first expanded game and not the expanded game with the focus. They both might be corrected with a single fix of appropriately targeted actions on the "in focus" game.
Strange.
Still present.
In addition it seems that games in Your Collections fail to reposition under any circumstances. Here is a GIF that start with a game in Your Collections showing lack of move positioning followed by the same game in Community Collections where move repositioning does occur. (Note: it wouldn't reposition if a game above was expanded as noted in comment #1).
How I reproduce the problem:
1. Visit https://www.chess.com/library/collections/long-games-2GvNnXLbQ
2. Expand the first game:
3. position on move 
The issue: If more than one game is expanded to show the moves, only the first correctly scroll the move window to position so the active move is visible. The foll0wing animated GIF was from Community Collections - Bobby Fisher- Most Memorable Games, sorted Moves (Desc).
The first game scrolls correctly, then the second does not, until the first game is closed. The second then correctly scrolls until a game above is expanded. Then is does not correctly scroll.