Boy, I wish I could tell you what's under the hood!
Sorry - I did not mean to imply you entered the two commas. What that all means is that you can enter Microchords in BIAB two ways: you can do it in that dialog box, as you did, or, if you are up for a real challenge, key them in. The educational aspect of that dialog box is that it does show you what the graphical interface will translate into a code you could have typed in. That's how I spotted that it wasn't coded as a triplet. Make sense? That pattern makes a pulse in your measures like this: Note Rest Note Note Rest Note etc. Say those six things evenly in time.
Right.
I did at first think you meant I had entered two commas instead of one.
But not the way you were thinking.
I started this whole exercise focusing on the main chord entry page. When I first discovered these micro chords (just a week or two ago) I was entering them on the chord page. That's why I kept writing (E9,F9) here, exactly what I was typing in the bars.
It was only later that I learned about the nitty gritty dialogue box. But in the end it didn't help out at all.

So when you started talking about the two commas, I first thought you meant I had entered (E9,,F9) on the chord page.
The main takeaway for me at this point in time, was the discovery by you, that inside bar 17 were the magical triplets I was searching for.
This proves that BIAB IS capable of playing them!
And the
best part is that BIAB is capable of playing them on my old, useless, slow, under-powered ancient computer system.

Now we just need to discover HOW to key this in so it will play them WHENEVER WE WANT!
I don't think anyone here has the answer to that yet.