I have noticed this "issue" (or not).
I have an album (which is a compilation of all songs from a rhythm game) which contains more than 1000 songs.
And as you can see on this screenshot:
For example, the track named "Cloud 9" is not the 9th track of the album, but the 1179th.
I also enabled the option to show the track number next to the title in the album and as you can see, it stops at 998
So I presume in the application code, Max has set the max number of tracks in an album at 1000 (maybe i'm wrong).
Could you please look into this "issue", because I don't have this in an other music app (BlackPlayer EX).
Thanks in advance and sorry for my English