.When Turbo Tax imported my 1099 -DIV and INT investment info directly from my bank, it showed up twice as exactly the same. Should I delete a row or is there a reason?

Review/Edit  each form to see if they match exactly what is on your paper 1099-DIV and 1099-INT forms..if  they are duplicates...delete the extra form.

Sometimes there is a reason to split them in two (usually just a 1099-INT form...occasionally a -DIV)...but none of  the box values would not  be exactly the same on two forms.