Anyone offer any advice on two problems I'm having with ephpod?

1. I am using an Adaptec 4300 firewire card. I have had my ipod for about a month and was getting 7mbs average on transfers. Tonight I am only getting 2mbs or under. I've tried rebooting and trying again but it didnt help. Any ideas of things I can check/change to get it back to how it was? Could any s/w I've added recently (I've just installed EAC) affect anything?

2. Up until tonight I was able to press Synch Ipod and it would just add any files that had been added since I last snched. Tonight its adding everything over and over again. ie every time I try to synch its adding every song onto ipod again.

Anyone any ideas?

Thanks :)