The gpx creation process does currently the same output format as Groundspeak origin, that means
Both are combined into an ZIP archive, which some of the geocaching apps can work with. I'm using a app, where fitting gpx-files is possible, but in my case handling several gpx-files at same time does not work correctly.
Knowing this issue, I normally need to combine both created files into a common file, which I then transfer to my moblie phone. Thus I'd request that (optionally, e.g. time by time or in personal settings) it can be decided, how the output of the gpx-file creation looks like, i.e. archive with one combined file or standard each a gpx-file and a gpx-wpts file.