I have now made 2 purchases with points at Caltex Woolworths since the 'swap' option came in.
Interestingly enough, seems as though the Woolworths POS system hasn't been very well set up. Upon scanning my card today, the cashier told me 'there is no discount today'. I told her I had already switched and the comment back was something like 'well, my screen doesn't show me that'. Nothing was recorded on the receipt, except for the EDR card number.
Last time I bought fuel, it was from a Caltex owned site, and their POS has actually been set up to state on receipts "vist (EDR website) to see how many points were earnt today"
Can see the problems with the Woolworths POS setup causing issues, especially for those who don't frequently use the card. Guess I'll just keep the receipt until the points credit to EDR