Duplicate Survey?

[DisGal71]

Hello
Still learning the ropes... usually when I log on, I go for the daily offers, paid clicks, scratch off and the Greenfield survey, from there I go and try to qualify for a OTX survey. After I'm done there, I visit the forums to learn some more. Well tonight I qualified for an OTX as I'm going through the questions they sounded familiar but I wasnt sure if the questions were exactly the same. I was nervous about leaving the site because I might lose the survey. I finished the survey and searched the forum for a similar situation. I found one, but I'm still not sure. I always enter the same information (demographics) and use the same email address, only difference is sometimes I'm on my laptop and other times on the desktop.
How will I know if it was a duplicate?
Just want to make sure I'm doing everything correctly and accordingly!
TIA!

[m 'n c]

OTX is tracking by email address so as long as you stick with the same email each time you try (highly recommended) and take one you will not end up with a duplicate survey.