You're right. In fact, it depends on which navigator you use (which is why some people can finish a map in 4 "seconds", while I am unable to do it under 15 "seconds"). I don't understand why, thought...
In the shop, if I set the sell amounts to as high as possible, then decide to upgrade my equipment instead, I can go back to the shop and sell as many of my resources as I had before I used them to upgrade. Which, naturally, leaves me with negative resources.
 "Square Man Idle")
 "Link It Up!")
 "Where Are My Pets?"){kind=icon}
 "Mysterious Town")
 "Optimal Route")
 "Naruto Online")
 "Paddle Master Idle")
 "10 years of fun with Kongregate")
 "Paladog")
 "Upgrade Complete 3")
 "The Gatekeeper")
 "Swords and Souls")
 "Blue")
 "Blocks 2")
 "Bear in Super Action Adventure")
 "Through walls")
 "Dream Car Racing Evo")
 "The Pix"){kind=logo}
 "Amberial")
 "Death Squad")
Thanks for letting me know! It's fixed now.