Hi,
Mohamed said that it is how auctions usually works online.
It's quite inpractical to have online auctions work like real life auctions due to the delay. Usually, an online auction spans over several days, and people won't be able to always check the website for new bids and add their bids. So instead they give their maximum willing bid amount and are notified only if someone has a higher amount.
I suppose that you know of ebay, the biggest online auction website in the world. And it works like that too.
As Mohamed said, we plan on adding a mode to work like what you're talking about in the future.
In the mean time, code would have to be modified like Mohamed explained. This will require some development (a few hours at least) and thus it's not something we can give like that. If you need someone to work on that for you, I would recommend contacting our partners:
www.hikashop.com/home/our-partners.html