Project Detail

Description

I recently upgraded my site, and need these things fixed
-all the registered users on my site have identical items in their shopping carts. Even after deleting items and setting the contents to 0, the next time they log in the items are back in the cart. It's reverting to the same set of items for every user.
-no order process emails are generated for 2checkout orders
-some order process emails are generated for paypal IPN orders (not all)
-paypal IPN orders are generated even if the customer hasn't paid
-shipping weight is miscalculated, sometimes correct, other times it comes up much higher. For example, even if the 1 item ordered is .8 and the tar is .3, the total shipping will come up as 2lbs for example, instead of 1.1lbs
-shipping method can't be edited once selected.
-login from forum page bottom is broken
-number of users online to the site on bottom of forum is incorrect
-the default catalog page should be modules.php?name=catalog&file=index&cPath=21 not simply modules.php?name=catalog
I'd like this to be done as soon as possible.