Can you remove automation lanes from MIDI controller list?

I'm using Sonar X2a Producer, and I've been working on some older projects progressively imported probably from as far back as Cakewalk 2.0.  I'm using the TTS-1 synth for a number of instruments along with two Garritan synths.  My problem is that whenever I add a MIDI automation lane for a TTS-1 instrument, I can't get rid of it.  For example, I added an Expression Automation Lane (cc:11) and decided that it didn't really do what I wanted it to do, so I did a right click in the Automation Lane in the track view and then clicked on Delete Envelope.  The Automation Lane disappeared, but when you go back to the Edit Filter drop down list, 11:Expression still appears with Volume, Automated Mute, Chorus, etc.  I can't get 11:Expression off of the list.  If it was just one or two controllers it wouldn't be so bad, but when you're experimenting with 8 or 10 controllers it gets to be a pain.  I tried selecting the Automation Lane, then right clicked in the lane and did Clear All before Delete Envelope, but that didn't work either.  In addition, I switched a couple of instruments from the TTS-1 synth to a Garritan synth, but the Automation Lanes in the drop down MIDI Envelope dialogue box still show the choices from the TTS-1, as well as that &^$#@ 11:Expression controller still showing up in the Automation Lanes list.  I KNOW that there shouldn't be anything at all in the MIDI Envelope dialogue box because the Garritan MIDI control list doesn't translate into Sonar.  Has anyone else had the problem of not being able to completely delete an Automation Lane? 

Thanks John.  They just sort of clutter things up, and it rubs on my OCD