I worked on a PLC 5/30 that was so full an online edit terminated & went offline.
I did some experimenting and found out that if I wrote lines as your example is, instead of multiple branches latching one output, that each branch changed to a separate line opened a couple words of memory - I was able to go through the entire program (offline of course) and open almost 1K of memory.
Also, it might just be someone was not experienced or comfortable using branches.