Hopefully its something simple, can you post a sample file?
Sure thing. Here is a file with the simplest possible example: https://dl.dropboxusercontent.com/u/1378250/Unicode%20Autocomplete%20Example.fmp12
There are two value lists coming from the same table. One is sorted by default and one is sorted by unicode. When using a drop-down menu derived from the default list, auto-complete works great. When using a drop-drown menu derived from the unicode list, auto-complete is broken.