When you use the back arrow on your browser it appears that it is not given but I believe it really is. It seems to be going back to the page as it was before you interacted on it. Which makes sense in a way. However, that isn't the way most works. If you continue and then go back later to the same thing I you will see that they have changed. Use the "back to..." links instead. I continue to use the back arrow because if I'm on page 4 I don't want to go back to page one, which is what it does.