Exactly, but that doesn't tell us if you're actually religious or not! You may or may not have a personal religion. That's why I found it weird in this case, where the while point of the survey was to know if people are religious.
IMO, religion is something organized and part of a community. "Spirituality" is when it's something personal (and, as I get older, I am coming to believe is an important part of my life, even though I don't believe in anything supernatural.)