Where to look for chapter appending & ordering

Brand new newbie here. I am using the gui Mkv tool (on windows) and I need a bit of steering on the Append feature. When appending subsequent chapters to the first file sometimes in the resulting *.mkv file they are in order I place them, sometimes not. As a work-around I drop-n-drag them one at-a-time, but I’m sure there must be a smarter way to ensure their proper order. Will someone be kind enough to tell me where to learn about this problem and solution?