I had a tiny stake reduction due to release in mid June. I decided to cancel this, but having done so, figured that it made sense after all. If reinstating the change the release would unfortunately now take effect a couple of weeks later than for the previous pending release, even though the impact to Numerai would be identical with no new round having started and the cancelled and reinstated change being the same.
Behaviour was as documented and expected, but it seems reasonable that cancelling and reinstating a change that occurred in the same round and for the same or a lesser amount would be given the same release date as for the previous pending change. Doing a soft delete of a pending change that only cleared after the cutoff for changes in a round would retain the information necessary to make such a decision quite easily.
Please consider this scenario with future changes to stake handling, such as the much requested stake management.