What happens to playlists I make on the remote?

I really like Roon Remote on my iPad mini…but on several occasions I have noticed a couple of problems. First, unlike playlists I make using my Mac Mini, the remote will re-order my selections. What I clhoose first may slip down to tenth or fifteenth playback position. All selected tracks are subject to list movement. Curious. Second, and more discouraging, more than half of selections added to my list simply are not there when I get ready for playback. Gone. Last night I selected 20+ tracks for my list, but when I began playback, only six showed up. This does not happen when I select tracks thru my Mac Mini, only with my iPad. Is this normal? What am I doing wrong?