Welcome to ADT, albeit under unfortunate circumstances.
Firstly I understand what you are going through because I have experienced a lot more Customs activity with my erodvd.nl orders as of late.
I had a 2 disc order confiscated about a month back and they were not "dodgy". I was going to write to C&E to ask them to clarify what their policy was regarding adult material. It clearly follows no pattern at Dover. One order may be passed and another confiscated.
A consequent order was inspected and let through. Another single disc got through safely 2 wks ago, then an empty dvd case??? arrived last week which was inspected. I thought that C&E were taking the piss by nicking the cover and disc. But I suspect erodvd sent it because I requested the cover(meaning the paper cover) be sent separately for the single disc order. It would help if erodvd let you know when and what they send so you can gauge if things go wrong.
In your Notice of Seizure did they list all 7 titles or the one they deemed "obscene"? All 7 should be listed if they have seized the lot.
It would be costly for you to go to court to fight your case and C&E know it, so most seizures end at this stage. Its up to you how far you want to take it but I would consider writing to them just to clarify what their policy is. It may not get your other 6 titles back but it could influence how you order next time.
I wouldn't worry about getting arrested as long as you are not importing the really sick stuff.
ps Drop Aline a note at erodvd they should help with replacing the order. You may want to consider an alternative shipping method.

