Hi Nick: You want to make a permanent change to the Explorer Tree and have that reflected when you apply the filter? And you would love it if there was some sort of auto-alphabetize functionality within the set? 1.) We do not have the functionality of doing auto-alphabetization, you will need to reorder your list of 300 in the Explorer Tree using "drag and drop". 2.) To make this change a permanent one which will allow for proper filtering you will need to "Change set key". You will, in particular, want to check the "Regenerate item IDs" box to reset the counter and apply new numbering to all existing items. It is the resetting of the counter which makes the alphabetization function so that your "filters can isolate and export correctly" and in the order you prefer.
All The Best,
HEADQUARTERS|135 SW Taylor Suite 200, Portland, Oregon, 97204