HELP! How did my sounds change overnight?

[ChromeCrescendo]

EDIT: I reverted back to an older version of the project and it now works but, I would still love to find out why the below happened

UPDATED EDIT: Well. after saving the project again (after reverting to a version that worked as I wrote it), I closed Logic and went to the store. Upon returning home, I once again opened Logic and, you guessed it, the entire project was playing all the wrong sounds -- I then reverted to an old version and it worked again -- what is going on here?

So I wrote this piece yesterday, saved it, bounced it as an mp3 and, today, when I opened the project in Logic, all the sounds had changed, the project was clipping and had "pops"

I am at a loss - what could have happened overnight? Did someone break into my place and change something? This makes no sense to me

I have restarted the iMac in recovery mode, repaired all permissions and still no fix

Here is the bounced mp3 from last night:

https://soundcloud.com/epicesquire%2F19a
Here is a screen recording I just made of Logic playing the track:

https://imgur.com/L71ZFUS

 

[StevePaselli]

If you are using Logic 10.5, update NOW to 10.5.1. If you are keeping your Logic files in any kind of synced folder (dropbox, seafile...), sync and put them in a non synced folder. The mac package format is seen by many sync services as a simple folder, if the contents are not fully synced when you open the file you’ll get this strange behaviour (don’t resave).