If I'm not mistaken, that form is a list form. I guess you are trying to customized a list form in InfoPath. Some features and controls are not available/supported when editing a List form
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Sean
On
I'm not entirely sure if this is the correct answer, but I'm running Infopath 2013 and I have that option on my forms. Might be something worth trying.
If I'm not mistaken, that form is a list form. I guess you are trying to customized a list form in InfoPath. Some features and controls are not available/supported when editing a List form