The information provided does have different requirements for Chile vs Austria, however both must have a visa issued prior to travel. Air Berlin is following the proper procedure, sounds like the airline you flew on did not. And just because Thai immigration did not ask to see it, doesn't mean anything. They may not ask to see this from every passenger, or the passenger list could have been transmitted upon the plane departing from Munich. If it is transmitted, then they would already have that information.
If you have done this in the past, do you think it's possible that something may have changed since the last time you did this? Also in prior travel what was your country of origin and your transit country? Any of these could play a role in this.
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