There's something of note: If you note down what Haruhi announces at the end of the episodes, you get a different watching order. Here it is:

Where Episode x is 'y' => next episode 'y', all y numbers are announced by Haruhi, and x numbers announced by Kyon.

Episode 1 (is '11'?) => '1'
Episode 2 is '1' => '2'
Episode 3 is '2' => '7'
Episode 4 is '7' => '3'
Episode 5 is '3' => '9'
Episode 6 is '9' => '8'
Episode 7 is '8' => '10'
Episode 8 is '10' => '14'
Episode 9 is '14' => '4'
Episode 10 is '4' => '13'
Episode 11 is '13' => '12'
Episode 12 _is_ '12' => '5'
Episode 13 is '5' => '6'
Episode 14 is '6'

So then, episodes should be watched (according to Haruhi, anyhow)
02
03
05
10
13
14
-- > which completes the series!?
04
07
06
08
01
12
11
09