In order to sort alphanumerically in the Project Assets panel, your clps will need to be named 0001, 0010, 0011, 0100, etc.
I found a program, BEST RENAME, that shows the original files in the correct sort order.
It also provides any easy way to insert a sequence number at the begging of the filename.
Thanks for your clarification.
Just in case comments....
The Premiere Elements 12 Project Assets offers two choices for Sort by:
Under Panel Options/Sort by:
File Name (ascending)
Have you explored bringing folders with sorted media into Project Assets and onto the Timeline to yield the ordered media on the Timeline.
Have you explored using the Elements Organizer (Newest, Oldest,....) and/or the creation of Albums for sorting before importing into Premiere Elements 12?
so pitiful this is the best they have and they use an antiquated left right sorting method.
REALLY sad Elements now 13 STILL after years of asking and reporting and still buying this junk does not do a simple asset sort by date? All we hear is whining about how its slow or requires xml code or some such nonsense.
SLOW is all the wasted time with added workflow and etc. to pre sort and rename and put in temp directories just to "work around" this flaw.
You do realize you're replying to a three year old post, right?
BTW Project Assets can be sorted by date in Premiere Elements.