There's lots of tricky floor numbering going on, particularly in mix-used projects like the Time-Warner building.
The Trump World Tower, near the UN, is advertised as 90 floors and it's only 70 floors.
In the Time Warner building, residential floors jump from the 23rd floor to the 51st floor, and no way is this an 80 story building.
It's based on if the building were totally residential, 8-9 feet floor to ceiling, and if the lower floors are higher, that's how they calculate the floor numbers.
Don't believe for none minute the Palazzo tower in Las Vegas is 64 stories, it's only 54 stories, because to attract the superstitious Asians, with their horrors of the number 4, all the 4's have disappeared, and go look at the elevator buttons: no 40th thru the 49th floor buttons are there!
And if that what it takes to make the Chinese more comfortable, then so be it!
Imagine what the brokers go through in NYC selling condo's to the Chinese!!! 8 is their lucky number, so they'll all want to live on the 8th floor or the 88th floor, and you couldn't sell them a unit on the 4th or 44th floor even if you slashed the price in half!