Hi Zajac, The policy of the Commsec trading platform has been T=...

Hi Zajac, The policy of the Commsec trading platform has been T= the day the Trade was made, ie the day the buyer purchased their parcel of shares through Commsec. +3 meant settlement day, when the money was removed from your trading account, it was 3 days after the purchase, So T+3.
However earlier this year (I think) Commsec changed their rule and it is now T+2. This means the money will be removed from your account a day earlier, it makes ensuring money is in your account a bit more timely.
From the earlier article, Assumpta quoting BUR and T+3, simply means the article has been drafted prior to Commsec's change, - no need for you to worry. This is also what steeleopads was saying. Commsec have changed and some information hasn't yet caught up. best wishes