And still occurring. Add to this the following:
1) It doesn't carry over to other pages, even if you manually activate. I changed it on the manga's homepage,m but when I went to my follows page, it was not showing read. It would show read on the manga's homepage if I returned to it.
2) Another thing being effected is the follows/dropped/plan to read/etc list. If you change a manga from/to "Reading" to something else, the change does not appear on the follows pages. I put one on "Dropped", but it remained in the "Reading" section.
I do suspect, as mentioned above, it has to be related to the servers, as I believe something like this had occurred int he past quite some time back. Something about the servers and they not being synchonized, IIRC.