So I waited until September 11, and when I listened on that day, I thought, nothing has changed. A few days later... (As of this writing, I am currently listening to A Different Sunday). I noticed, that they changed the schedules of their popular programs such as Republik from Saturdays to Sundays from 6AM to 6PM, right after that is A Different Sunday. However, I was not able to catch the schedules of some of their old radio shows nor the new ones if they have any. The radio station did somehow change their format after-all, they are now playing more songs from bands that I haven't heard of or from bands who are only popular to hardcore music nerds and hardcore alternative music fanatics, they are now playing more songs from indie bands (I think).
Jam 88.3, you are truly a beacon of good alternative taste in the music airwaves, specially during (these) Sundays! Keep it up! However, I am still yet to hear what really is the change, or whatever has been changed.