It seems that there is or has been a bug which means some orders do not appear on the dashboard and so you may not be aware of them. Please check in the manage orders section to see if you have been affected.
This was first reported in this post but we are aware it has happened to a wider number of people. Fiverr is aware of the issue and it may have been fixed but you could still be affected.
If you have been affected and have had an order go late or cancelled due to being late, contact customer support and explain what happened.