Hello jefff65 -
If you create an Item Details profile with your template and seller details profile selected within the Item Details profile, the seller details profile should load with your item details profile on to the listing you are creating along with the template saved to the profile. (Note that a template is required to be able to add the Seller Details profile).
Without seeing the custom template you refer to it is difficult to say what may be occurring with the HTML tags; please be sure that when you are adding HTML within the template editor, you have the editor set to Source so the tags are not interpreted as text. If you have further issues with such, please file a support case from under the Help tab letting us know the template this occurs with and an listing we can take a look at as an example and we can have a look.
As for the Auto Relist - if you use a profile when creating a listing that has a quantity set in it, that quantity will be used for the listing you are creating - but that is only going to affect the listing the first time it is posted. If the item is set up as an inventory item with an auto relist profile on it, when it comes back from eBay and the auto relist profile activates, it will go back up to eBay with the same quantity as it had when it closed. So, if you have an inventory of 5 and sell 2 and the item ends and the auto relist profile sends it back to eBay, it should go back up to eBay with a quantity of 3 (unless you have modified the quantity).
- Craig