Do identical variable names cause lost data?

[jarvis24]

[edited from support email]
After collecting all my data, I realized that I made a serious error in naming my variables. I had two questionnaires, each which were exactly the same, but I showed different pictures in each. The variable names were exactly the same. They were placed in the same experiment, with questionnaire 1 always coming before questionnaire 2. The program did not record one set of responses. I need to know whether Medialab would have overwritten the responses to questionnaire 1 or whether it would simply not have recorded the reponses to questionnaire 2. I cannot tell by simply looking at the data as the theoretic responses should be the same.