i need to turn off the vertical white lines in audio files in Adobe Audition CS5.5 any time I position my mouse pointer in a given audio file

Anytime I position my mouse pointer to a different position in an audio file (in Adobe Audition) and left click the mouse a vertical line gets created in the audio file .audio file. Those lines totally screw things up in general. e.g.; The playback volume is changed and it’s a total pain to get rid of them. They only started appearing recently and I have checked al preferences, but found nothing that turns them off.  My install download appears to be dependent upon the Adobe Creative Cloud but when I run iit to re-install the app, this version (CS5.5) is not available.  A fix is urgently needed. Please advise. Thx.