You are seeing exactly what I found. If I put in a factory-made movie BRD and select 'disc information', NXT2 reads it as 'closed'. But when I put in my own authored/burned movie BRD, 'disc information reads it as 'open, data appendable' and NXT2 will not close it - I get the same result that you show "please insert .........". The folder names and filenames are the same on both the factory movie BRD and my movie BRD, so I am assuming that they are the same movie format.
Since NXT2 reads my disc as "open, data appendable", I tried adding a couple small files to its content using NXT2. The result was NXT2 reporting "please insert a disc". My discs read "open, data appendable" by NXT2 but act like 'closed' in every other regard.
I contacted cyberlink, the mfgr of 'powerdirector11' (my BRD authoring program) and they confirm what myguggi wrote at the beginning of this thread. Cyberlink wrote: "Regarding your concern, I would like to inform you that the bluray disc burned using PowerDirector 11 software are already finalised after burning and can be played using bluray players and drives."
So unless someone has more input, I am going to assume that cyberlink is correct and mail out the wedding discs. If recipients complain that they don't work in their BRD players, I will just send the medium resolution DVDs and find another authoring program.
Thanks everyone for helping.