First of all, you will see events just from your 'default' indexes, depending on the User's role, as someoni2 said.
Then, if you have strange dates as newest or late see bent, this means that there's a time stamp problem: so if you see events in the future, check for events in that time range and check of time stamp in the event is translated. The same if you have events older than they are supposed to be. It's a quite common problem, if Imunderstood right your question.
Happy Splunking,
Marco
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