Basics: I have version/build 11.0.0.3230, and despite clearing the cache, and deleting shadow and temporary files, I'm having a problem where the program seems to reference cached audio or video from an entirely wrong part of the movie I'm producing.

What I'm doing: I am adding captions, from the Subtitle Room (F12), in Timeline View. I'll play a few seconds, stop, create a new subtitle and type what was said. I then play the video again for a few seconds, and repeat the process.

What's wrong: About half the time I click the play arrow, the audio that then starts playing is from somewhere else in the production. (Audio and video tracks have been unlinked.) Occasionally, instead of the audio being from somewhere completely different, the video will be from somewhere else. These miscued video/audio locations are random, and from all over the (hour and a half long) timeline. Occasionally I get "lucky" and both the audio and video are screwed up (though never from the same spot, which I imagine would make me feel like I'd moved everything myself).

How I'm coping: I'm to the point where I have to hit the play arrow, listen quickly to tell if the audio is from the point my timeline is on, stop and back up the cursor to do it all over again . . . until it's the correct part. Typically, on the third or fourth try I'll hear the right part and enter some more captioning, and then get back to dealing with this glitch all over again.

Far more than half the time this is happening.

Please help! Thank you.