I didn't read everything on my Already Read list, especially those put there in the earlier days of this account. I had to mark stories I tried to read but didn't finish/ended up getting put off by somehow and at the time I thought it was a good idea to tag those as Already Read lol
The ์ฉ you mentioned is actually just ์ as in "hm?" A verbal nod/acknowledgement response when being called by someone.