InfoPath Dev

I have an exisitng form and I am unable to add a repeating section.  I have a template I can load from our library which has the repeating section the way we want it, however, I am not finding the repeating section control to replicate this feature.

I have searched the web for instructions and they assume that the option is located in the control tab. 

Could it be that this feature is not turned on?  Or do I have to programmatically create this control?  All I want to do is append a comment field if a user adds additional info.

Can you check the form type? Is it a SQL bound form? A SharePoint list form?

The type of form matters; certain controls are not available for certain form types, and sometimes the form schema is locked as well.

Knowing more about your form will help. If you can, you can attach the form itself or screenshots via the Options tab when replying. Thank you.

I am pretty sure that the form is SharePoint List form.  Not sure how to check this.  I have attached a couple of screenshots.

InfoPath list forms have a locked schema (which means the schema is locked to the list and you cannot modify the schema), plus list forms cannot handle repeating data. Those are likely the reasons why you cannot add a repeating table.

Then how can I have a form that has a repeating section (with history) which functions correctly but I can't copy the same control.  In other words, I have a form in infopath I open up. The repeating section is on the form and shows the repeating section and captures the history.  I would expect to open up InfoPath and insert a similar control. 

 My guess is that there is some behind-the-scenes configuring that is not apparent.  Is there a way to expose the form's config, settings, etc.? 

My guess would be that one form is a normal InfoPath form and the other is an InfoPath form that is bound to a SharePoint list. As Ernesto pointed out - these different types of forms have different controls available to them.