It seems like my reading progress on the offline stuff is not synchronizing with the server.
Also the new reading progress from the server to the offline is only coming in partially. If I change the status of the comics at the beginning of the list, that gets synced but something 30 comics down does not get synced(offline list)
Is there like a syn button like the iOS?
No, there is no button there, the synchronization happens when the app comes to foreground and after closing a comic, but the server has to be reachable when you open the app or when you close a comic.
When I notice some of the comics not syncing ... i did some more tests.
I noticed that if you force a comic to "Set as Read" or "set as Unread" from the Server the status is not change offline and vise versa offline tablet to server. I've checked on my iPad and its the same. But if I see more non-synchronized stuff I will report it here.
YACReader
