Your saved documents use the template Support.dot, but if Word is set up to use Normal.dot on new documents that is what it will do.

There are options in Tools > Templates and Addins that allow you to modify the Normal.dot options, but to be honest I have never used them, so I can't advise how to do so.

One option I can think of is to find all instances of Normal.dot on your computer and change them to Normal.old, then copy your Support.dot and rename the copy to Normal.dot.

By changing Normal.dot to Normal.old rather than deleting them, then you can always recover the proper template in the future if you need to.

I hope that helps.

Mark