Have you seen this before? First time for me.
 
After recording 3 takes on track 2 I get 3 Take Lanes, one for each take/clip. Expected
 
I cropped each of them so they would not overlap.
 
When I played thru them I could still hear them overlapping. Not expected
 
When I MUTED all of them I could still hear the clips. Not expected
 
When I moved all the takes to their own individual tracks leaving nothing on track 2 and played track 2 SOLOed I could still hear and see the clips in the main track. Not expected

 
I moved the rest of the Take Lane clips to track 3 and their track 2 clips disappeared in the main track. Expected

 
To solve the problem I deleted track 2.
 
How does this happen?

I wonder if this is related to Picture Cache files going wonky. Next time it happens I should close Ckwk, delete the entire Cache, then reopen Ckwk.

That's strange.
 
I assume you're in the "comping" record mode right, not sound on sound? (https://www.cakewalk.com/...help=Recording.11.html)
 
But even so, if you've trimmed the ends of those clips, the audio should not play. What happens if you highlight all of those clip sections - then right-click to select "apply trimming"? Does the extra audio go away?

Too late for that since they've been moved to new tracks and track 2 deleted. I'll have to wait and see if it happens again. Hopefully it was a one-time event.
 
I almost always use Sound on Sound which creates a new take lane each time you record.

I had a similar glitch with a MIDI clip. It was a short piano clip in a break leading to a key change in the next verse.
Recoded the next verse, guitars, bass, keys and vox, deleted that piano clip, but it continued to play for weeks whenever I played the song until one day, it just stopped.

I had a similar issue when comping with take lanes open, where I would mute a clip and it would still sound. I decided that the clip had somehow cloned itself invisibly (I say invisibly, because if I click-dragged the clip there was no other clip hiding underneath it).
 
My workaround was to mute the clip then 'Bounce to clips'. Because the clip was muted, the bounce to clips only made audible the invisible cloned clip when rendered. (Of course the clone was now visible) .
 
It happened in several projects. I dubbed the anomaly a ‘ghost clip’.

I'm having this issue too... I've trimmed the clip to take out the ending but it still plays even though I dont see the audio waveform... and I need it actually to be trimmed aka not playing. I am trying to compile the vocal track from different takes but I can't seem to get the bad performance parts of one take to delete/not play... even though I can't see them anymore.
 
Evidently, my issue was in using Melodyne. you have to delete the waveforms within the plugin as well.

I 2nd the Melodyne error. Once Melodyne has done the track importing, deleting the original recorded wav does not stop Melodyne from playing it`s own clip. Chantelar was correct. Drove me nuts one night when I had deleted 7 tracks of Audio, but all 7 were still playing. The tracks were empty - - I`m not sure this has anything to do with the original post. So good luck anyway.

But in my case I wasn't using Melodyne.