unwanred mtext wehn importing points file

When I import a data file of X,Y,Z points into Land Desktop it displays a mtext for each and every point as well.
Land Desktop 06 (Civil3D)
What I'm trying to do is import the points with a marker and a display of elevation (selected as Point Settings,Text,Elevation prior to importing)
The trouble is, as well as displaying the elevations of the civil point, it is also displaying a mtext for each point which appears to be the first numeral of the elevation.
It's only started doing this in the last few days and I can't figure out why it's doing it when it used to work fine.
Thanks for any suggestions,
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