Discrepancy creating partitions for BT5R3 install

[EStyles]

Hello all,

I am having an issue installing x64 BT5R3 with Gnome on my laptop. I have done this install before without issue so maybe I am overlooking something. I am following this guide. My issue is with creating the first partition:

root@bt:~# fdisk /dev/sda

WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
         switch off the mode (command 'c') and change display units to
         sectors (command 'u').

Command (m for help): d
Partition number (1-5): 1

Command (m for help): n
Command action
   l   logical (5 or over)
   p   primary partition (1-4)
p
Partition number (1-4): 1
First cylinder (1-30401, default 1): 
Using default value 1
Last cylinder, +cylinders or +size{K,M,G} (1-65, default 65): 

Why, after selecting the first cylinder as the starting point, does the number of cylinders drop to 65 from 30401?

[EStyles]

Well after disconnecting the drive from my laptop then formatting with my desktop, reinstalling to laptop and attempting the OS install again, everything has worked properly. I'm not sure why it did not work before, but all is well now.