You are still clogging the history. You dont use the "Show preview" button do you? Here is the first paragraph; you really need to read this, and I've bolded a few things: 

 "Below the edit box is a Show preview button. Pressing this will show you what the article will look like without actually saving it. It is strongly recommended that you use this prior to saving. This allows you to check what the page will look like first and to check that you haven't made any errors. It also prevents the need for multiple saves. Saving the same article a large number of times in quick succession makes it harder for people to check what changed, and clogs up the page history."