Agree. It would be an easy area to get right, relative to other things, but the website is reflective of systematic IT deficiencies.
I recently received some endlessly long customer satisfaction surveys following two flights - a flight with connection, but of course I received two separate questionnaires... and one referred to a Thai Smile flight when it was in fact a TG flight. The questionnaire was near endless... took about 30 minutes to complete... and that included having to start over twice due to getting webpage errors.
Of course, the old favourite in TG surveys - requiring answers to questions where no option suited.
TG does so well in some areas, but then in others you just wonder who is in charge.