Text appearing outside of UILabel bounds

[ThomasIndustry]

I am creating a series of UIlabels dynamically using the NGUITools.AddChild<UILabel>(this.gameObject) function, but sometimes (Randomly about 20% of the time) the text shows up outside of the bounds area. If I manually disable the game object and then turn them back on, it corrects it's self, but this is not a very eloquent solution. Does anyone have an idea of what might be causing this?
They are under a panel with soft clipping and have their pivot set to left.

[Dean]

Try using NGUITools.MarkParentAsChanged(gameObject); after all changes

[ThomasIndustry]

I have tried that  and also tried levelName.MarkAsChanged() and levelName.SetDirty()

[ArenMook]

Make sure to set the text last, after the position/width/height have been set, but that's all I can suggest without having more details.