on OE/CN screen you fill in OE/Invoice number and Sage loads details

I have certain customers where all OE/CN are on account, trouble is once you erase the OE Invoice# the screen details erase (can we stop this from happening?)

I did not want to manually program macro to copy Invoice details to screen so I made a custom POST button that posts it as applied from OE to AR

then I immediately edit the AR Invoice entry to blank out OE Invoice#, Order Number and put OE Invoice# as reference

Seems to work **almost** always, I am wondering if POST/SAVE function returns to mainline while another function is still doing AR interface

Is there a function to fetch invoice details and while invoice# field is blank so it looks like user entered all the lines.

-or- is there some kind of way to make all CN for a customer on account no matter how CN was made?

thanks for any suggestions