When exporting from a larger device template to a much smaller one, sometimes the content will not scale perfectly and fit to the exact device dimensions of the smaller version. It may require some slight adjustments to files that were output from the export. However, if you start your design with the Standard iPad template (1024x768) Multi-Device Exports will generally scale more accurately when converting to a device size up or down since this size is an average/middle-ground for most tablet device specs.
If you have any follow-up questions please do not hesitate to ask!
Mag+ Support Team