Futurama Inconsistencies

From watching Futurama, I have noticed that there are a lot of inconsistencies. First of all inflation is not taken into account and all of the things in the year 3000 are the same price as the year 2000. In theory things would cost much more in the year 3000. Fry and other characters talk about being rich with a million dollars, but a million dollars in the year 3000 would be like $60 following current trends of inflation for 1,000 years. Another inconsistency is Cubert and Dwights age. In 3001 they were 12 years old because, they were born in 2989, but Bender’s Big Score, the movie takes place in the year 3008 which would make Cubert and Dwight 19, but they do not look any different from when they were 12. Another inconsistency is that it is stated in Futurama that their spaceship the Planet Express can only travel at 99 percent the speed of light. If this is true how do they travel billions of light years in a matter of hours? That should take billions of years at the speed of light, and the show says that they only travel 99 percent light speed. How did they go to the other side of the Universe and back in a week when Cubert and Dwight Prank phone called them for a delivery pretending to me Professor Farnsworth, if they can only go 99 percent the speed of light how did they travel across the universe in 3 days? The Universe is 180 billion light years across, so it takes light 180 billion years to travel the Universe. This means that it should had taken the Planet Express over 180 billion years to travel one way and another 180 billion years to travel back to Earth. Why are there so many inconsistencies? Don’t the producers of the show think about these things before they make a show? Please give suggestions. Thank You.