Problems with Gui Editor

I've added a guiScoreControl and every time I resize it (and click apply) and then click on something else and then back on the object it has resized to its default dimensions. Things also seem to move around to unwanted places when I go in and out of the editor. Am I doing something wrong?

Also I can't seem to add any text to any of the objects. I want it to display Score: Score value but entering text into it just means that it will say 'score' until I move off zero score and then it will be replaced by the score number. How do I do this?