Frankly, TLF text is a horrible beast and messes up your swf if not used absolutely correctly.
Luckily you can get details on the formatting used in classic text by using the getTextFormat method like so:
var textField:TextField;
var textFormat:TextFormat;
textFormat = textField.getTextFormat(0,0); //replace these numbers with where in the text you want to read the formatting
trace(textFormat.color)
trace(textFormat.font)
trace(textFormat.bold)
trace(textFormat.italic) //etc