Zend certified PHP/Magento developer

Random products added to order after checkout

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As stated in the title, after completing checkout on a test order and checking the order within the admin panel, the test order has random products added to it. What really confuses me is that the added items aren’t in the product catalog, so I’m not entirely sure where they’re coming from. They only show in the order after checking out.

Additionally, the customer inputted address isn’t showing and is replaced by a default Magentech address. Obviously I would like orders to reflect what the customer has inputted so that I can ship their items to them.

I’m new to magento and taking over the work of another developer, any information that helps lead to a solution would be greatly appreciated. Thank you!