Problem with the Blog Page

Hi! Ive got the Pro Version one week now and I have to set up all settings from the Free Version in the pro Version again, so far so good. Now I have the problem, that the latest blog article shows up in full length without structure and at the end of the page all the other articles included the latest one are listed how I want them to actually be.. please help me PS: when I try to fix this issue in the customizer the article in full length is gone. Please tell me which setting I have to change that all articles will shown in the typical blog preview structure