Missing Photos after enabling iCloud Photo Library
So I've been battling with iCloud photo library for a few days now.
I have a semi-large collection of about 15k photos, upgraded my iCloud storage and enabled iCloud Photo Library. It uploads (forever), but after it finishes it randomly drops all kinds of photos. This last time it wiped out around 96 photos from my collection, no trace of them not even in recently deleted.
Example: My library has 14850 photos, when it finishes uploading, it now reports 14754 photos (difference of 96) and I can see a few photos are now missing. iCloud.com reports that I have 14583 photos (difference of 267). The photos are completely gone from my local Photos library, they are there during upload, but once it finishes it just removes them as if they never existed. I've ran consolidate against the library, nothing is referenced and everything is in the library. I've also started over and re-migrated my iPhoto library and same results.
I have backups of the last good iPhoto library prior to the upgrade, backup of the new Photos library prior to enabling iCloud photo library. I've restarted this process about 3 times on two separate macs, deleting all photos and starting over, but with the same varying results. I have wasted a lot of time on this, and deleting photos is a serious problem.
Mac Pro, OS X Yosemite (10.10.3)