Hi,
I submitted a bug here: https://bugzilla.wikimedia.org/show_bug.cgi?id=34029 This is about the API blocklist. Mark marked it as a duplicate of https://bugzilla.wikimedia.org/show_bug.cgi?id=24782. It is about recent changes. Yesterday I was fighting with usercontibs for a long time before I realized that it has the same problem. This is already the third field. You may think it is not very likely to have many contibutions for the same user in the same second, but this is not necessarily the case with bots. (I am not speaking about whether it is a polite thing to use bots this way, I am speaking about working with user contribs once this happened.) I myself do such things without bot when I open several articles in neighbour tabs for parallel processing.
So hundred words end up in one, as we say in Hungary, time given in seconds is inappropriate for query-continue in any API services as it is not unique.