I have multiple values in Sprint field for defects where I want to filter defects with Sprint when they created in.
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An issue will have multiple sprint values when it has passed through more than one sprint.
Looking for issues that have a certain sprint on them is sort of missing the point of sprints, and it is not really that useful when you're doing sprints (no-one really cares what sprint an issue was created and adopted in, you care about whether it got done or not). I cannot say this is right for you, but I think you probably need to be looking at something else - rather than sprint, look at creation date for example.
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