1. Good observation. Stock management is a tricky part. I think we will try to add restocking feature into core in next release.

2. For order # you need to reset table accoutrement for orders to start from 1. This needs to be done in your Mysql database.

ALTER TABLE ac_orders AUTO_INCREMENT = 1;
NOTE; ac_orders might be different on your database and you need to delete all records from the table first.

For invoice #, once you delete all orders from above table you can set invoice # to start from 1 in admin -> settings -> checkout.

Thank you for clarification. We will keep this in mind as feature improvement 

Its only works at payment page. But i get error on shipping page (the page going to nowhere after check the auto select on weight based shipping or any other options) . Need help, thank you

Before we say this is a bug, we need to know what error do you get. Please indicate exactly what settings do you have that cause the error.

Thanks

Oh, yes. This would have to go through our partner that supports marketplace.
I think they also in process of updating site to allow resale.

There is a link to register if you go to admin -> Extensions -> Extensions store.
 

You can submit your extension on our site after you register.

http://www.abantecart.com/sign-in

Once we review and approve your extension, it will be available for everyone to download.

FYI:
We are working on new site for AbanteCart and this process will be easier.   

This is set in Admin Currencies -> Edit Currency - Euro
You can position symbol to right or left.
Euro already set to the right

Problem is solved. There is a typo in the cart class.

Open this file /core/lib/cart.php

Locate line:
if (!isset($taxes[$product['tax_class_id']])) {
$this->taxes[$product['tax_class_id']]['total'] = $product['total'];
$this->taxes[$product['tax_class_id']]['tax'] = $this->tax->calcTotalTaxAmount($product['total'], $product['tax_class_id']);
Replace with:
if (!isset($this->taxes[$product['tax_class_id']])) {
$this->taxes[$product['tax_class_id']]['total'] = $product['total'];
$this->taxes[$product['tax_class_id']]['tax'] = $this->tax->calcTotalTaxAmount($product['total'], $product['tax_class_id']);