Liquidshop page URL's are generated with an ID, so when changes to page titles are made the same page content is presented from the data base. This means if the previous version of the page has been indexed, no 301 is required to redirect. For example, the following page is the same:
Therefore the link to the database remains constant and there is no need to add endless 301 redirects for every time a page is amended. Once the website has been reindexed by the search engine then the amended title will be present within indexed links.
Please note this refers to the actual page title and not the meta title.