The easiest way would be to add a text value of " " (i.e. an empty space) to the label immediately before the 2nd telephone control.
This should add a non-breakable space into the span element (the .net label) before the input element (the 2nd telephone textbox control) which would cause it to display in the browser and occupy the same space as the other labels - thus aligning the textbox control with the others.
Failing that you could define a class in your stylesheet with a margin-left property and then apply this to your textbox using the cssClass property.