Thank you so much for trying to help me out!
Here is how I added it to the Custom Tag Def. I tried doing this with other tag codes. But am I right that custom tag codes only use TXXX/NAME?. Should I use another code maybe?
This is my preferences for TAG(1) and TAG (2)
Here I added some tags saving each one after I entered it. See how it is nicely on an autofill list
I closed MB and restarted it. Now it only shows two values. (Usually it is just one)
I hope this helps.