After importing a preset.zip that contains a number of fields in a certain order, that order will be kept within the "Fields" tab. The order is important, since the default sort field and the auto-created templates depend on it. There is no web based way to resort the order, so we have to take much care to import a preset.xml containing the fields in a clearly defined order.
When exporting the preset, the resulting preset.zip contains a preset.xml that have all fields totally unsorted, in a totally unclear and unlogical order.
The exported preset.xml should have all fields in the same order as in the web interface's "Fields" tab.