@andstatus@loadaverage.org In order to give Users more information on efficiency of syncing I added another column to the timeline list: "Dnl." - it shows total number of messages downloaded vs new messages, shown in the next column.
So e.g. you can see at the attached screenshot that "Sent for yvolk/Twitter" timeline was synced once (1}, downloaded 192 messages (after this application upgrade no sync history existed for this timeline, so it downloaded maximum number configured), but only 1 of those messages appeared to be new, i.e. only one message was not stored in the local cache yet. https://loadaverage.org/attachment/3116442