How to arrange Custom Blocks

The Custom Blocks in my game seem to arrange itself randomly unlike all the normal blocks.  It would be nice to have them arranged alphabetically.

It also doesn't seem to arrange by order of creation/editing.  The arrangement is just random.

their is a up and down arrow at the top. just highlight the one you want to move and use those.

not that.  the block list on the right.  where custom blocks are showed as green, actor blocks as blue, scene blocks as red/magenta, etc.