For what it is worth.. My fish picker is eratic on my Windows98SE system as well. I also have 3 SS installed N414.20.5590 1.1 WIDE and 0303.201.504. Each shut down / start up there are one or two more random selections.
One interesting side note though.. I thought 8 fish were (was) something built in for future versions. But I can select and keep 8
Enclosed is a screen capture of my fish picker..