Bug in OnMarketDepth

[maxima]

I have code:

protectedoverridevoid OnMarketDepth(MarketDepthEventArgs e)
{
Print(string.Format("Depth: {0} {1} {2} {3}", e.MarketDataType, e.Operation, e.Price, e.Volume));

which produces output:
Depth: Ask Insert 113.7 25
Depth: Ask Insert 113.72 20
Depth: Ask Insert 113.73 159
Depth: Ask Insert 113.74 185
Depth: Ask Insert 113.75 152
Depth: Ask Insert 113.76 196
Depth: Bid Insert 113.69 20
Depth: Bid Insert 113.71 16
Depth: Bid Insert 113.7 34
Depth: Bid Insert 113.69 191
Depth: Bid Insert 113.68 330
Depth: Bid Insert 113.67 282

113.69 comes twice. In the NT DOM it is 20. But in the code I have to replace with 191 as it came after.

DOM is pretty much static - after trading hours it doesnt move at all. 20 was before I reloaded my indicator and 20 after that.

But in my data it is 191.

I connected to IB.

I need this somehow fixed as I cant count volume in bid/ask ladders.

Thanks

[NinjaTrader_Ray]

OnMarketData() is correct in its events. Try switching DOM to different instrument and back again to see if it shows the 191.

[NinjaTrader_Ray]

To double check, are you using SuperDOM or Level II window? If this is a stock, you should use Level II window. You likely will see two rows for the price 113.69 each with different volume levels. This is an insert operation not an updata at that price level.