Well some more information here would help us assist you like a url and integration type and a test login to post a review.
First off are people are typing html in their reviews which I am assuming they are doing here since CAPITOL HTML TAGS have been deprecated for like 6 years now since the release of XHTML. No program that I know of uses this type of html so I am assuming this is your case. If they are typing the HTML then this is displaying correctly as we do not allow html unless you set that admin switch to YES.
If people are not typing this then what integration are you using? Like I said capitol html tags have been gone for years.