I think your post number 31 is correct. Matching selections are sorted by a specific order. The default is by back price. The sorting order is lowest first to highest last.
You can change the sorting order of matching selections by the condition:
selections sorting order is defined by.....<here you put a variable>
in post 31 your thinking is correct, but the order of the matching selections is by back price
selection 1 back price = 1.72
selection 2 back price = 1.89
etc. lowest first
i.e. they are not sorted chronologically by time when they went below 2.0 and were added to the remember list. Instead they are sorted by back price.
Using the above condition, you can change the sorting order of the matching selections, but you need to decide how.