Not true. Many products have the kosher symbol on the back not the front. So it being on the back doesn’t necessarily make consumers question it any more than if it were on the front. Many people will make a quick scan and find the symbol without noticing there are other panels. And some people who did see other panels will still naturally think a kosher symbol anywhere on the front or back of the outside packaging means everything inside is kosher.
And Rabbi Genack disagrees with you. He agrees it can be confusing and it should be eliminated.