Are you saying that some fruits, like bananas, can make you more hungry when you eat them? I have certainly never experienced this myself. When you're cycling and you haven't eaten enough you can sometimes get incredibly hungry and tired in a short amount of time. I take a ripe and mushy banana with me for when that happens. It fixes the hunger and tiredness very quickly.
I'm certainly no expert on this matter but yes, certain foods do exactly that (like banana's).
I think the key to what you are describing is that you were exercising at the time - taking in something like a banana during that would actually do exactly as you describe - boost your sugar level when you need it the most, aka throw some fuel on the fire.
But again, I'm just a guy that has had tremendous luck with monitoring my GI and my hunger and have a few really knowledgable friends that have helped me along the way.
I have experienced that sometimes eating something can make you more hungry. It happens when you were hungry some time ago but you didn't eat anything. After a while the hunger fades away and when you eat a little bit it comes back. But I haven't noticed this being different for different foods.
So are you saying that if you eat something with a high GI then your blood sugar rises, and this makes you hungry? This seems counterintuitive as high blood sugar usually makes you not-hungry?