Blog text problem- Change of them to twenty fourteen and twenty sixteen

Hi, I changed my theme to twenty fourteen and even tried twenty sixteen but without no improvement. My blog text still look the same, at the text field one can see the code. I even tried to go to the textfield and take the code away and past it in again without no result. I googled and search at the forum but found no similar text. Can anyone help me please, thank you in advance.