The problem in the original question is that the strengths of glacial acetic acid and Kodak Indicator Stopbath are different. Mixing them together would create a solution of unknown strength. Better to use each alone until one is used up.
The indicator will still indicate at the pH change.
You can always just dilute the stop bath as normal, and add a small volume of glacial acetic acid to this when the pH indicator indicates it's bad, thus lowering the pH again the indicator will switch back to the normal colour.
My high school chem teacher told us an easy way to remember that sequence. She said acid > water is "aw wight."
Mine taught us "Do as you oughta, add acid to watah". The efficacy of mnemonic devices is proven daily.
If you call it a "prime lens" because it's a fixed-focal length (i.e. not a zoom lens), then as Inigo Montoya said so eloquently, "You keep using that word. I do not think it means what you think it means."