Bank transfer and currency symbol questions

Hi, guys!
I have the following problems to be solved:
1) Bank transfer
For the Bank payment reference [#orderId#] is being used for identification, which is a pure number. That seems to be matching the Post ID, right? My question is where in the system can I see a list of the IDs of the orders or posts, in order exactly to match the payment and the invoice in Prices and Payments? Is there a way, that we see the post IDs in the Invoices section of Prices and payments?
For the moment I really can’t find it and thus we will not be able to match the bank payments.
2) Currency symbol
In our country it is accepted, that the currency symbol stays after the sum, separated by space. For example, we would write “300 $”, instead of “$300”. Where do I change that?
Thanks and keep on doing the same good job!