Saw the mistake
That is the great thing about wikis -- mistakes are easily corrected <smile>. Before making modifications to templates it is a good idea to check the what links here link in the lower left sidebar. It will give you good information on how popular the template is. If it is popular, I make a copy and play with the copy until it works properly so as not to break on the linked pages. If I end up modifying a popular template, I try to check a random sample of linked pages to make sure that I did not break anything.
PS your Matrix Algebra pages are looking great! I hope we can get matrices working in the <math> tags quickly so as not to slow you down.