Generally yes, most lots will close at the completion time that the auction is set to end. However, to prevent sniping, the auction end time will extend 3 minutes when someone places bid 30 seconds before auction end.

Each subsequent bid will extend the auction by another 3 minutes from the time it is placed.

So, if someone places a bid at 11:28. The auction would then close at 11:33. If somebody places another bid at 11:32, it will now close at 11:35. This way everybody gets a chance to bid as much as they wish.

Because the software must determine how long to extend the auction based on the number of bids received after 11:28, it cannot accept proxy bids. Every bid placed during this time is a
normal bid, and will be immediately reflected in the bid.