FSRS Helper - need help

For context me and my friends are studying for an exam in November of 2026

We recently discovered FSRS and swaped our huge decks to it, all of this because of the easy days feature and break features

However we have a weekend coming up that we wanted to make it easy days so we did but im unsure how it works, in the addon page it states that any card with higher >3day interval will be reschedules however after i selected those dates 25th and 26th of july as easy days i still was able to reschedule reviews for those days??

Furthermore today i went and did through FSRS Helper "Apply easy days now" and now not only am i back to 0 reviews for the 25th and 26th but 20 of my reviews today just evaporated? I assume got rescheduled?

One last question, not regarding the addon but rather FSRS, my "good" intreval for new cards went from 1 day to 3 days, is this because of the easy day feature i programed for this week end or its just built in for FSRS vs SM-2

For setting i am at 90% retention, deck has arround 8k cards for me, another friends of mine has 16k cards and seems to have the same behaviour as me.

Any help apreciated