permalink issue duplicates on bluk edit

We have spent the last two weeks trying to sort out this same problem. We are set the custom_permalink field using the API and it generally seems to work on an individual basis. But when we bulk upload product info JSON, a small percentage of products seem to get their permalink changed to be wrong. And usually it is with a number at the end similar to yours. We have even changed our bulk uploads now so that they do NOT even include the custom_permalink. Still the problem occurs so it seems that custom_permalink is getting corrupted by our product upload feed even though we aren’t actually changing that field at all! Can you offer any further information? Is the problem still occurring for you?