Yes its due to importing from either Word or Outlook.  The easist way is to do what digi suggests.

It is possible to fix but is quite a bit of mucking about - go into revise and then go to HTML tab and change

each

<SPAN style='FONT-SIZE: 12pt; FONT-FAMILY: "Times New Roman","serif"; COLOR: #333333; DISPLAY: none; LINE-HEIGHT: 115%; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: EN-AU; mso-ansi-language: EN-AU; mso-hide: all; mso-bidi-language: AR-SA'>

to

<SPAN style='FONT-SIZE: 12pt; FONT-FAMILY: "Times New Roman","serif"; COLOR: #333333>

There are about 19 to be corrected.

You also appear to have duplicated the error so you would also need to remove the duplicated text.