Bug Fix (File Path issue)
At the moment within the recent April update as well as the previous, PP seems to have a bug the confuses (mismatches) cache files of files with the same name but different file path.
For ex; If File ((Clip A) "0027 MTS.") is located in folder Day01/ Sony Cam/ Card A002 : It would have the audio taken from a different clip ((Clip B) "0027 MTS.") located in file path Day02/ Sony cam/ Card A001.
Ultimately this gives "Clip A", "Clip B's" audio.
This is a new issue because I've been working in this format for a while but only recently (Premiere 2018) have had this issue. Along with other Known Cache issues.
I'd think the issue lies within file path recognition.
The only way I've fixed this issue is to add letters to the ends if the effect file. This solution is very impractical.