I see this is still not fixed - they have not published any Lat fares ex-Europe still. There are lots of channels many of us can use to write - I might use a couple of mine. You would think it is deliberate but it is probably not. There is no reason they can't just add a Lat fare at ~$400 over comfort. I think the issue is that the old "FF" fare family essentially was a full fare and Lat was B or Y all the time. Now FF means Comfort - and perhaps someone has not thought this through exactly or made the updates. It could also be a problem with the fare naming convention. For example, in LX (and likely LH) "FF" is basically the fully flexible fare and gets the designator "FF". They don't use comfort - however - AC and LX are sharing fares and FF is the fare indicator which perhaps is causing a conflict at the AC side. I would write this in if you have a contact. I have had fare issues over the years where I wrote it in when it looked like there was an unintentional issue on the fare rules.