The Swedish reps who pushed wrong said there were some changes last minute to the agenda, confusing them and in effect probably caused the wrong button press. Though I haven't been able to find for certain if this was the case.

I am glad most Swedish reps voted against but will definitely use my vote next election to try and remove the ones that voted for (yes there were some that voted for and not by mistake) and people incompetent enough to not know what button to press when it comes down to it.