Wow, even if I'm able to understand all this, it's a mind-bender! I think I get it. But I do not agree that it should be that confusing for the sake of up-to-the-minute accuracy.
That should be what the summary sheet is for: to keep a "real time" list of current meds. If I write a progress note (encounter note) and I close it and re-open it, it should reflect nothing more than what it did when I closed it, IMO--the meds which were current prior to forming a treatment plan.