Problems with focus.

Hello,

I'm having the following problem when I add a "RadGrid" and set the propiedade "EditMode =" Batch "" control "RadNumericTextBox" has strange behavior in their focus,
sometimes identifies the control received the focus and then apply the "SelectAll" content, but sometimes the control receives the focus and position the cursor at the end of the content, and  also not  recognize that there was a change in the content and does not call the "OnTextChanged" event. This only happens when I set the property "EditMode =" Batch "" the "RadGrid"

Thanks in advance for your help.