I am using the latest Legend VST Mac version and all presets are unsorted. I am using High Sierra with APFS which seemed to cause similar issues in other VST plugins but the Legend demo didn't have this issue. There is also an issue when you select a preset inside a folder and then use the < and > buttons in the plugin, it jumps back to the root folder and selects a random preset.
Thanks and hopefully you can figure out a fix, it makes using presets very frustrating.