As I point out in my book, when you copy a title, you create a clone of it -- and any modifications you make to one, you make to every copy.
To re-use the look and style of a title, you should right-click on it in the Project Assets panel and select Duplicate. This creates an independent copy of the title that you can revise and re-use.
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As Steve points out, what you have are three Instances of the same Title. They are clones, and are linked to each other - change any one, and you change them all. This article goes into more detail: http://forums.adobe.com/thread/1131177?tstart=0
Also, one could do what you want, with but only one Title, as Effects, all of the Fixed Effects, like Motion>Scale, Motion>Position, Opacity, etc., can be Keyframed to change over time. Most of the added Effects, can also be Keyframed over time. One can animate almost anything in a Title with Keyframes.
For a great overview, with instructions on using Keyframes, I strongly recommend Steve's Learning Series - Basic Keyframing, available at Muvipix.com. I have never seen a better set of articles on Keyframing in PrE.
Just what I needed! Thank you Steve Grisetti and Bill Hunt!