There is a lot of general confusion over the semantics of the cell timestamp. In particular, a couple questions that often come up:
- If multiple writes to a cell have the same timestamp, are all versions maintained or just the last?
- Is it OK to write cells in a non-increasing timestamp order?
Let's discuss, figure out what semantics make sense, and then move towards (a) documentation, (b) unit tests that prove we have those semantics.