Today i have seen there are so many late answers in queue which is answered long time before.
How it is possible?
Yes, this is a well-known, but temporary issue: Raise the rep bar on late answers
The change took effect going back to the start of the site, but once all the current reviews are completed, the effect of the change should be only a few extra answers on the queue every now and then. It should not be a continual flood of tasks like you see here.
Sorry about the alarm.