I have also seen similar problems on several occasions. Usually after 3.00 pm (and sometimes before that too) many of the orders placed are shown as "INPROCESS" in the Order Book. This means that the order is in que for being sent to NSE. You cannot even modify or cancel these orders. Sometimes, this "INPROCESS" status remains for 20-30 minutes or even more. Meanwhile, the market may change drastically more than once. So, you loose money and precious opportunities. Once I was calculating and found that the low brokerage advantage on RMoney is taken away by losses due to such "INPROCESS" orders.
I have heard that RMoney people deliberately use this "INPROCESS" trick. While the person who placed the order gets the "INPROCESS" or in que message (i.e., for him, the order is yet to be sent to NSE), but the order is sent to NSE in some other client name or pseudonomously. If the order results in profit, somebody else pockets the profit while the real client keeps getting the "INPROCESS" message till the end. On the other hand, if such order does not result in profit or if the market reverses after some time, this "INPROCESS" order is shown executed for the original client after a delay of 10-15 minutes but generally with the original time-stamp.
People say that Rmoney (or some employees in the Rmoney) is making money in this manner, compensating for low brokerage. So, "RMoney" is "Our Money". One wonders whether the SEBI or NSE will dare look into such malpractices, if at all they exist.