Use the utility to transfer the AutoCorrect files from your old normal.dotm to a new one. You do not want a read-only normal.dotm. I think the problems you are seeing come from using a Word 2007 normal.dotm in Word 2010. This is not a good thing to do.

You can use it, unchanged and even read-only, with the AutoCorrect utility, then move it to your Startup folder from the templates folder, with Word closed. When you restart Word, it will create a new normal.dotm. Your macros and shortcuts will be available from the old file in your Startup folder. Then use the AutoCorrect utility to reinstall your AC entries in your new normal.dotm.