Need to check stores for availability.
Extra 50% off is automatically applied at check out.
ie: Nike All Court 2 comes down to $25 compared to Hype DC's sale ($50)
Edit: Call your local store to see if they will honour the 50% off, as according to this comment: https://www.ozbargain.com.au/comment/5149893/redir
they should be able to do it.
I found a pair of shoes that could be delivered but instead of half price off the sale price as advertised they were coming up as 50% off the full price. I spoke to Platypus shoes via their facebook and got no follow up. When someone else had posted on their wall that their order had not arrived and platypus shoes had no record of it and they could not get in touch, I replied I was having the same issues. If you phone their 1800 number it goes to a voice mail that is full. I went to email them and went to get my screenshots from my conversation with them and they had blocked me from their page. The post the other person was posted was deleted as well.
Maybe I dodged a bullet here?