RadNumericTextBox internal blur event trigers onchange after onchange has occured

[Wayne]

Using Telerik.Web.UI version 2012.3.1120.40
I have a RadNumericTextBox using the js onchange event. This has been working previously, however I now notice the onchange is called again by onTextBoxBlurHandler as (if(this._initialValueAsText+""!==a){this.set_value(a)).
So now my onchange is beting called twice and breaking things.
Was this intended?