Orders might not get filled for your smallcase in the following scenarios
Insufficient funds while placing the orders (even though a funds check is conducted when you place any order - prices might have changed resulting in a/some order/s not getting filled
If the stock is already sold on the AxisDirect interface, orders might be unfilled (If you have sold a smallcase stock directly via the AxisDirect interface, this doesn't get updated in your smallcases and hence results in unfilled orders)
Liquidity issues or stocks hitting the upper/lower circuit - This is very unlikely for smallcases built by the research team.
There are 2 actions you can take when you have unfilled orders: