Blank transactions appearing on one half of transaction

[Jeff]

I just happened to come across an issue where I noticed that one side of a
transaction is blank while the other side is fine. This blank amount causes the
balance of that particular account to be incorrect, which obviously completely
defeats the purpose of using GnuCash.

I am using GnuCash v2.4.13 on Mac OSX v10.8.5 Mountain Lion.

I have found several transactions with this same problem, and the one common
factor seems to be that there is an exchange rate involved between them (one in
USD and the other in CAD).

So normally I import transactions from a CSV file into say my USD Bank Account
register. Once they are imported, I open this register/account (its a BANK
ACCOUNT in this case). I then manually go thru each transaction and change the
Transfer from Imbalance to the appropriate EXPENSE account. If it involves
different currencies the Exchange Rate dialog will open up, and I will set
either the Exchange Rate to the To Amount as required. In this case the
Exchange Rate is set to 1.0.

   QUESTION 1
   Is there a way to search for all these blank transactions? They do not
   appear
   when I search for a Value equal to 0.00
   QUESTION 2
   Is there a way to have all these accounts re-updated automatically
   without
   having to manually search thru each register and manually try to fix
   it?
   Thanks