I needed to make some grammatical/ nomelclature changes, But, Could not edit the previous post.
so posting again 
"Thats because you are inserting into an array of a predefined size.
For ex,
When you try inseting a 1D array 'A' of 50 elements as row 1 of a 2 D array of 40 elements(in row 0 ), only only the first 40 elements will get insetred into 2 D array. You lose the last 10 elements of array 'A'
To avoid this, I suggest you use XY graph( of course you have to create an x axis with the index of each element in the inserted array and plot on xy graph).
Any doubts, do get back"
regards
Dev