PSD files rolling back to previous saved points on their own

Question

I've been using Photoshop CC for awhile now and I'm quite happy with it except for one problem which I've been noticing. The PSD files seem to roll back to previous saved points after closing and saving them. It's not immediate, but after a few days it happens. Which means I've been losing hours of work across all my files. I'm not sure if it's connected, but it usually happens after every time I update CC, which is very frequent. Either that or Photoshop has never been saving the files properly in the first place.
I use Photoshop CC on two computers: Macbook Pro Mavericks and Desktop PC Windows 8.1. I transfer PSD files between them constantly using an external hard drive. Which brings up a scary point, identical files on both my computers and hard drive roll back to previous saved points, so I am pretty sure it has nothing to do with my hardware.
Anyone else noticing this or is it just me?

Answer 1

Forgive me, but let me add to Noel's comments.
Is the time signature on both computers the same? That is, when you look at the time on either computer, is it correct?
Also, since you are on CC, have you considered saving the images you are working on in you Creative Cloud folder? You can start work on one computer, save and close the image, then when you are on the other computer, open that image directly from your CC folder on that computer and continue right from when you left off.
Here are a couple of points to be aware of and to consider for this to work: CC works just like DropBox, you will have a CC folder on both of your computers and they will contain any file(s) you put into them. When the Cloud notices something new or updated, it will transfer the file(s) up to the cloud. When you are on the other computer, it will notice there is a new or updated file(s) on the cloud and will download them automatically to your other computer. The file(s) are ON you computer, not solely in the clouds. To make this work though, you have to have your CC account be started and running for any work to transfer into or out of your computer. If the CC application isn't running there's nothing to control this mechanism. (E.g., if PS isn't running, you cannot open a PS file, if CC isn't running it can't do the transfer thing. [The CC application is the icon that is red with the interlocking infinity like thing in the middle.]
You have 20 GB of storage on the CC and that should be big enough to hold most projects till they are done.