Kindly try using the website. The app rearranges the pictures according to days. For more flexibility, follow the following steps : Step 1: After a paragraph, press enter. You will see a plus icon when you hover around it. Step 2: Click on the plus icon and you will icons to post multiple varieties of stuff. Click on the camera icon. Step 3: Select the pictures and import. Step 4: Click or double click below the picture and you will see option to write a caption. Do so!
You are good to go