Partition table entries are not in disk order

[Mouse Rusty]

I have just found that my partition table are not in disk order, Is
anybody curious to know why?
The netbook was pre-installed with SLED11 by HP and changed to ubuntu
netbook 10.04 later by me. I have never re-partition it because I have
to keep my home partition, the only possible operation is to re-format
swap and root partition during ubuntu installation process.

Could it be that, HP gives us such a strange partition table? and How
to create it...
------------------------------------------------------------------------------------------
   Device Boot      Start         End      Blocks   Id  System
/dev/sda1            2613        3122     4096575   82  Linux swap / Solaris
/dev/sda2   *           1        2612    20980858+  83  Linux
/dev/sda3            3503       38913   284438857+  83  Linux
/dev/sda4            3123        3502     3052350   83  Linux

Partition table entries are not in disk order