Hi there!
I never saw this problem happening before.
If I understood you right, my plugin is ignoring the alignment set on the event command, and only accepting alignment changes by using the plugin command. And that is making all alignment set to "left", despite the event command set them to center. Right?
If this is the problem, is an easy fix. But I may only be able to fix this later this week. But please, answer me these two questions below:
1 - Are you using any other plugin that is messing with the choices or message window? If yes, could you tell me what they are?
2 - Can you also confirm to me that this behavior persist on my sample project?