at first, as hinted by @cmerriman, use limit=0 in your timechart to avoid that your search displays only the first 10 indexes.
Then, in you search you have also Splunk internal indexes (_*) that don't consume license and aren't in the license consunption search.
At the end, probably you have indexes that didn't receive events in the last 30 days that's the time period of the license consuption search.
You can easily check this using the Splunk Monitor Console App, where there's a dashboard displaying all the information about indexes, in which there's also te last events in index [Settings -- Monitor Console -- Indexing -- Indexes and Volumes -- Index Detail: Instance].
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