Help needed with inconsistencies in text formatting in the native iOS Notes app

iOS & iPadOS

hi all, I'm currently using the notes app on an iPhone 6 using iOS 9 .2. I have noticed sometimes when I'm typing notes that it appears as plain text, or other times it will form itself in a list with numbers at the start of each line. I really don't know how I have done this, but it is quite annoying if I just want it to be a normal text, could someone tell me how I am doing this? Also apparently you can use this as a checked list so you can tick and untick items, does anyone know how to do this using voice over