Litecoin difficulty in cgminer

[knuckles]

Hi folks

I've just recently started to mine litecoin on cgminer with the coinotron pool.

I'm currently running win 7 x64 with 1 hd5870 avg ~391Kh/s

Last night my difficulty level with coinotron was 32, I came home tonight to find that its jumped up to 64.

Also cgminer is showing ltc difficulty as being 6.59mill?

Is this normal?

Thanks

Knucks