Try using the VariableLogger QPAC to find out what the values are before you call the Chain QPAC.
Also, start by using the EmailReceiver in just a regular workflow, rather than one that loops. Start by keeping it very simple, try one qpac at a time, use variable logger to make sure you have the variables you want, then go to the next step.
Download variable logger here:
http://www.avoka.com/avoka/qpac_library.shtmlIf you send a screenshot and an export of your process to info@avoka.com, we'll take a quick look to see if we can see anythying obviously wrong.
Howard