https://www.instagram.com/p/BhosSWxjvYr/?taken-by=ryabenko_olga21
Check the first comment of Olga Ryabenko (costumes designer) there. She said both dresses were made very urgently, without trying-on - but second one was ordered later and they were ordered in the same day (most likely), before shooting - but second one was ordered at 12 of night.
P.S.: well, on second thought I think that shooting was probably just before Alina went to Japan - and they were compelled to introduce some double fast since they were short of couple of seconds. Else all other explanations aren't feasible enough.