This is my opinion. I realize not everyone will agree or even understand. Lets take the 25/28 split as an example. Why bet more than one unit on it? Meaning, we'll say I actually want to bet 5 units on it.
2 on 25 & 2 on 28 & 1 on the split. Of course putting all 5 on the split pays the same, I dont argue that.
My point being, its NOT needed to put them all on the split. Another.....you have 6 units. Why put them on the split? 3 on 25 & 3 on 28. Another......you have 9 units. 4 on the 25 & 4 on the 28 & 1 on the split. You'll never need to go over ONE unit for that split. I was playing last night, I see so many goofs with STACKS on splits (lol).
The only odd exception I could see.....others have a huge stack on 25 and you really dont want to add to it, I get it. Then maybe use that split.
Ken