Hi There.
Please tell us what template you are using and better still post your problem in the appropriate forum I.E JA Tiris problem post in JA Tiris forum, you have a better chance of problem being noticed and solved in the correct forum rather than a general one.
Please look at your extensions/plugins/ and see if tiny MCE editor has been enabled as well as JA typo plugin. Perhaps you may like to look at purchasing the complete JCE Joomla Content Editor and using that, Most people here use that and have a great knowledge base of tips trick etc. There are the free versions that gets the content there but the paid extras like the media manager etc. make life so much easier. Here’s the link to the JCE website
Hoping this helps you sort out your editing needs
Shane