Revit Keynotes By Sheet - Alpha Character Note IDs Will Not Work

Description:
The Situation: We have demo sheets and new construction sheets. Demo sheets need to be annotated in the Keynote Legend with the Keynote Value being alpha characters, ie: "A, B, C ..."; new construction sheets need to be annotated with the Keynote Value being numeric characters, ie: "1, 2, 3". Likewise, we differentiate General Notes (alpha characters) from Drawing Notes (numeric) on new construction drawings.

The Problem (see note below for specific info about attached file): Generally speaking, when annotating keynotes "by project", Revit allows me to use the Keynote Value alpha characters, ie: "A, B, C ...". But when I switch to keynotes "by sheet", the the Keynote Value ID bubble on the sheet shows "1, 2, 3 ...." even though the keynote TXT file is populated with "A, B, C ... " notes. What am I doing wrong with Revit that prevents me from having the Keynote Value as alpha character notes "by sheet"? Or is this a Revit glitch that has not been called out?

*** Note that the attached OOTB file uses the CSI format for notes; the keynote value should remain as in the file, ie: 1000, etc. Revit will not keep the "1000, 1001, etc.; it forces 1, 2, 3, etc. when keynotes are "By Sheet".

I have tested this whole concept with an "out-of-the-box" keynote legend file from AutoDesk, which I have attached (incidentally, I deleted most of the file because the default file size was above 102.4kb which is the limit on this forum for TXT files).

Thanks,
Greg

I'm guessing its the way Revit Generates the Keynote Schedules.
When Loading the Keynote File, you have 2 options, either By Sheet or By Keynote
You can't have both options in your project
I would use the " By Keynote" Option, and then just add ABC's & 123's to your Keynote File