I don't think I am mistaken, actually, mainly because with higher volume, you don't see that gap between the 2, so obviously the market doesn't value the 5% fee in the same way you do.
Highest Bid for AM100: 0.04130000
Lowest Ask for AM1: 4.55000000
Sure, you might be able to get lucky with limit orders, but right now you're looking at AM100 being worth less than 91% of AM1. If you actually want enough volume to move an entire AM share, you would take AM100 down to 0.04080001. If you want to move multiple shares, you are SOL.