Losing audio when merging separate video & audio tracks. (fcp 5.14)

I am merging separate audio and video tracks. When I go to Modify >Merge, the resultant merged clip is missing the last 25% of the audio track. So it plays correctly and is synched correctly, but the audio just disappears 75% into the video. This shouldn't be the case as the audio takes are all longer than the video takes.
When I pull the audio track into the sequence and sync it up to the video track in the sequence editor, it plays fine. I'm not sure what could be causing this problem, as it has only cropped recently. I've had no problems merging clips by using Modify > Merge before. I tried changing the audio from 44.1 khz to 48.0 khz and back again, but i run into the same problem in both.

Try this ridiculous workaround. I don't know why it works this way.
These "---" are the extra steps.
To get a good merged subclip.
Open the audio file and add the 'in point' to the slate.
---Drag audio clip to the timeline.
---Drag the audio clip from the timeline to the browser window.
Merge with video.
Viola. Audio won't drop out. But the waveforms are completely off with the sound.
Next step is to open the merged clips and Make Subclip so you don't have that extra media in the beginning and end. And the waveform seem normal.

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This exact same thing is happening to me. This "feature" is exponentially duplicating empty tracks. Clearly this is a bug in the code designed to break merged stereo tracks out into individual mono tracks. These are not empty stereo tracks. They are recorded as mono tracks with audio in them but being "split" into multiple tracks, one with audio and the rest are blank. The problem is that Premiere is treating ALL tracks as stereo and creating a number of new, empty tracks for EACH track equal to the total number of tracks when you use the Merge Clip feature.
i.e. If I have 3 tracks of audio that I merge into a clip, it creates 3 tracks for each of those three tracks, resulting in 9 total tracks (3 with audio and 6 empty ones). 4 tracks in a merged clip creates 16 tracks, 5 tracks creates 25, etc.
I have tested this with stereo and mono tracks in a merged clip and the results are the same. I got interesting results when I merged stereo and mono tracks into the same clip. I had a single stereo track and 5 mono tracks. "Merge clip" turned this into 27 tracks. 5x5 mono tracks plus the original stereo track that was split into 2 mono tracks, making 27.
HOWEVER
This phenomenon has not occurred on every single clip in the film I am currently working on; rather, it has only occurred on most of them.
Specifically, this only seems to be occurring when merging clips including multi-track .wav files. There were a few scenes where the sound guy only recorded the two actors with lavs onto a single stereo track, with the actors split between the L and R channel. When the stereo track is merged it correctly makes two mono tracks out of the L and R channels. But every single clip I have come across since then where he also added the boom mike or a channel for a third actor, I get exponential track city.
The conclusion I have come to is that Premiere is recognizing these multi-track .wav files as separate mono tracks when you drop them on the timeline, but the "Merge Clip" feature is mistakenly reading each track in a multi-track .wav files as a "single multi-channel track" that needs to be broken up. I say "single multi-channel-track" because there isn't a word for it that I am aware of. A single track with two channels is called "stereo" but it is like Premiere is reading the four mono tracks as a single track with four channels, but then making it worse by thinking EACH track has a number of channels equal to the number of "channels" it thinks are in the track.
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I am having a lot of trouble with Internet connection today due to local storms. The above link was snowy when I viewed
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gary Boland wrote:
When downloading HD video into FCP
I think you mean "importing", not downloading.
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Losing audio when merging separate video & audio tracks. (fcp 5.14)

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