First you would need to check which rules are fired on your site (if you have implemented Adobe Launch or any other TMS).
When you say backwards do you mean using the back button in your browser? If that is the case depending on how you site is implemented it might behave in a specific way that loads different states on your site when you click on back button.
For example in some SPA when you click on back button it will unload current route, then load another route inbetween the previous route and and the current route to do some things. If you implementation looks at hash change or url change then it would trigger analytics calls for the route used in between