These can easily carry over from other sites or documents if you are copying the description from somewhere and pasting them into the editor. I have also seen this happen when the encoding on the pages, and the character encoding and collate on the MySQL database are set to conflicting values, however I would put my best guess on my first point about copy/paste being the culprit. When editing your product in WP-eCommerce or page in WP, click the editor over the HTML using the tab in the top right and look for these symbols, or strange spaces, or apostrophes that don't look right. Delete them from the description and replace with the appropriate character desired.
P & P - Postage & Packaging:
Localization and language packs are always interesting, especially when the plug-in comes from a different country anyways. You can change this by going to your "/wp-content/plugins" folder, opening the "/wp-e-commerce" folder and navigate down to "/languages" and then to the "EN_en.php" file. From here you can either do a text search for the following two entities and replace the resulting text with S&H or whatever you like. Just remember to use "&" for the ampersand (&).
For everyone with line-number friendly code editors:
a) Line 757
b) Line 776
These only appear when you are logged in as an administrator, but I do understand that they can be a bit annoying even for an admin and even remove them from my templates. You will need to first locate your theme files. Best practice is to have relocated your themes files to "wp-content/uploads/wpsc/themes/<yourtheme>/" where <yourtheme> is the name of the theme you are using "default" is most common. In this folder you will need to remove the following line:
<?php echo wpsc_edit_the_product_link(); ?>
From the following files:
All better :-)
First things first you will want to fix the "1. Billing/contact details below:" line as it is currently an active field when it should be a header. In the store admin, Settings -> Checkout. You will see this line and then a drop down box with a few options. Make sure "Heading" is selected here.
As for the rest of the process, I am afraid I am not able to offer much help as the server appears to be running very slowly right now and took about 10 minutes just to squeeze the following error out:
Warning: urlencode() expects parameter 1 to be string, array given in /nfs/c02/h06/mnt/39341/domains/getskinrelief.com/html/wp-content/plugins/wp-e-commerce/merchants/paypal_multiple.php on line 185
Warning: Cannot modify header information - headers already sent by (output started at /nfs/c02/h06/mnt/39341/domains/getskinrelief.com/html/wp-content/plugins/wp-e-commerce/merchants/paypal_multiple.php:185) in /nfs/c02/h06/mnt/39341/domains/getskinrelief.com/html/wp-content/plugins/wp-e-commerce/merchants/paypal_multiple.php on line 251
This is happening because on the Billing form you have compounded the Country and State into the same variable in the form of an array: collected_data and collected_data. You should remove this custom code from the file and instead return to the store admin section and go to Settings -> Checkout. At the bottom you will see a link to "Add New Form Field". Click this. Though it will appear at the very bottom you are able to set the order so that it will appear after city and before country. Set the type to "Text" mark it as mandatory and you will be all set.
Hope this helps, and feel free to let me know if you have any problems.