You'll have to use custom validation rules instead of just setting fields to cannot be blank. You'll want to add a field to your data source to track status (or last view completed, or whatever makes sense to you) and then use that for your custom validation. For example, let's pretend you have a field called Status and when the first view is submitted, you set that field to "View 1 Complete". Then, for all the fields you require in view 2, the validation rules would be:
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If the field is blank, and
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If Status = View 1 Complete
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Display a message "Cannot be blank" or what ever you'd like the message to say
Make sense?