It appears that sometimes, it doesn't show all the followed topics. I'm not sure if it's done by purpose but I prefer to report so in case if it can get fixed (if bug).
Example on admin's profile with the issue:
On the issue, it doesn't say the other "followed topic", it stops to "and".
Example on admin's profile with a normal behavior:
On this one, it shows all the followed topics without stopping to "and".