That up/down feature already exists but really should not be used as a work around for what is currently a limitiation in the system as it will most likely result in the contribution of invalid data if you or anyone forgets they have locally altered the disc order to something they should not have and then later contributes data.

AIUI the system currently assumes the first disc in a title would be the primary disc in the set and the title only has one status, not a online/offline per disc so the status of the first is used to determine the status of the title. Changing this would be a big job and there are other much more important things the developers need to get done.

A better fix to this which I think works is if you tick the hide the MCE inteface option for the discs you don't want.

The reason the discs are done individually is becasue each individual disc can be linked to a different file or folder, changer, location etc for selection and playback, for each disc to be playable each needs the individual ability to point to the necessary location seperately

However AIUI at least for the PC there is only one online/offline status per title so the title status is determined by the status of the first disc I believe when a title contains more than one disc. The filters and searches operate by title rather than by disc. That is one of the reasons the discs shuld be placed in order such main title then say a bonus disc in the discs tab. If you have the feature disc online and the bonus offline the title should show as online.

I can't comment on the apps that may or may not be down o a difference or bug in the way the apps handle the filters.

EDIT actually it seems the tiel should flag as online if any disc in it is online.

Ah the perils of text speak AIUI (As I Understand It) which after checking it seems I didn't hence the edit added to my earlier post above I was either mistaken or things changed at some point in the past.

A title should flag as online if any disc in the title is set as online and I have gone and checked the icons displayed as well just to be sure that is working properly and indeed if any disc contained in a title is online the title will display the online icon (assuming it is enabled) and list/filter as online. Sorry what I said earlier in the thread was incorrect or out of date the ordering of the discs should have no effect. Your description of your problem made me think that could be the issue but if it ever was the case it is not in the current release.

Filters are accesed through the 'list' tab and you can create custom filters in Collection Management accessed from that option in addtion to the pre-defined lists/filters such as 'All titles' 'Online titles' 'Offline titles' etc. under the 'list' button.

The discs tab is the tab opened in Collection Maangement when you click the "Disc(s):" button, it has Assign Discs at the top of window, though in fact the ordering in there should not be as I have confirmed by testing the cause of any issues as regards a title flagging as offline or online.

My point was the list/filter is Online titles and not Online discs, and will return any title with at least one disc in it marked as online.

If you have not already done so please update to the latest build I just tested your original post about the icons displying or not based on which disc is first and I cannot reproduce it. If you have online and offline icons set to display you should get an online icon if any disc within the title is marked as online and and offline icon if all the discs in the title are marked offline.