OK, that is a breach of standing orders, but the rule that prohibits revisiting a matter within six months is not based on statute. If a majority agreed to rescind the decision, then it seems probable that a majority would have been willing to vote to suspend the standing order. It's hard to see that a court would overrule the decision to rescind if it was taken by a majority vote in a meeting properly called. Ideally, the clerk should advise the council to follow standing orders. Beyond that, it's a matter for the electorate.