When you are trying to create multiple lines of text field in SharePoint 2013 you are only provided with 2 options for text type
In SharePoint 2010 along with these 2 you also have ‘Rich text’ option which is not available in SharePoint 2013 while creating the column.
But, after you create the item and go back to edit it, you see the other option which did not show up before.
Now you have 3 text types to choose.
Here is an other blog which talks about issues with multiple lines of text column in SharePoint 2013.