I used the Reversal option instead of NSF. At the end didn't read the last question and the check was reversed using the original date (September). To correct this error  I went back and "re-depoist it" (same chack number) using September's date to zero out the reversed transaction, therefore Septembe is ok now.
 
I need to re-reverse the check in October but the system is not allowing me to do it, unless I reverse it using September's date again.  
 
What I need is to bring back that invoice into the A/R payment was applied in error.  How can I proceed without having to create a new invoice.
 
This mistake has to be fix before month end.....thank you.