cgwatcher vs bfgminer - show different hashrates

[Knarlomatic]

I'm using bfgminer 3.4.0 and cgwatcher 1.3.2.2

The hashrates reported between the two don't match.

Bfgminer reports 0.31/0.32/648.3 Mh/s

Cgwatcher reports 315khs/315khs

I'd also like to know why bfgminer reports megahashes, when scrypt is never more than kilohashes if you are using one card like I am.

rig specs:
Win 7
Sapphire 5870 1GB ram

I'm mining on multipool.us using scrypt if that helps.  I am wondering if since it is a p2pool if that makes the stats go squiffy.

Thanks all for your help.

This is my newbie post - so be gentle.  I'm just getting started and playing with things to see if I want to continue mining....so far it looks like not.  But I'm enjoying it anyway.

K