Hi tchu,
This problem will be solved in 1.3 final release. The problem lied, as you noted, on how the id of the tag in the panel was generated. It was substituting all characters that were not numbers or latin letters for "_", so all those tags that you posted were getting the same id "__", and so only one was displayed. If it worked for you in japanese it was because the tags that you tried had different lengths. Anyway, we changed how this id is generated and so now all tags will be displayed.
Thanks for your help.