These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Special Effects Failure: Apparently at one point Ray Harryhausen was going to do the creature effects, but to save money a small shop in Mexico was contracted instead.
More mundanely, the matte painting of the US Capitol building through the general's office window is at a size and angle that implies that the general works in the statue of Grant on the National Mall.
Values Dissonance: The male lead spend much of the movie being casually dismissive and misogynistic toward the female lead, an adult scientist who is treated like a child by pretty much everyone. For laughs.