Numeric Textbox changing value by itself

[Stacy]

I have a numeric textbox.  If I was to enter 123456789112345.67 in it, the control changes the value to 703687441776.64.  This behavior can be seen in your online demo as well (https://demos.telerik.com/aspnet-ajax/numerictextbox/overview/defaultcs.aspx).  Why does that happen?

[Stacy]

Ok so it's a max issue on the textbox. 

I'm trying to cancel this and show a message to the user by using the OnValueChanged event but it doesn't fire the first time.  Why is that happening?

[Stacy]

If I load a textbox with a value from the database, click in the textbox and add digits, the event doesn't fire. 

 

It will only fire if I delete the previous value and enter a new one.  That doesn't seem correct.