Corrected entry: 1-11 "A Small Problem": At a swimming pool for juvenile swimmers - especially with such a water slide - the pool would have to be sufficiently deep to acommodate visitors comfortably. Yet Ben/Grey Matter seems to be standing on the pool's floor with ease, given that he is six inches tall and about two inches (his head) are above the water, since he makes no swimming movements. And despite all that, Howell Waynewright is able to fully submerge *and* grab Ben from below instead of from behind, which he would have to do if Ben had been swimming.
Corrected entry: 0-0 entire series: When Ben changes from the alien forms back into human, he usually wears his usual attire: a white T-shirt and brown pants. But in some episodes, like "The Krakken" or "A Small Problem" he wears different clothes - or even just swimming trunks, yet he appears dressed in his normal clothes.
Corrected entry: 1-8 Tourist Trap: One of Sparkville's 'giant' attraction is a huge ketchup bottle - filled with ketchup. It would rather be strange to keep the stuff - or even just paint - in a huge bottle out in the open, since it would either spoil, evaporate or dry up, and refills would come too expensive for a container this size.