Unfortunately this is a big limitation. Essentially Quickbooks is only allowing me to have 1 Accounts Payable account in USD. In my company, we have around 7 Payables accounts, in CAD, USD, and EUR. So I will be forced to merge all of them into just 1 account? 

This especially doesn't make sense because I have my vendors set up in multi-currency as well. I am trying to enter a journal entry to post a vendor bill against a payable account, but due to the different currencies, its preventing me from doing so. Again this is a serious limitation.