Please note that the timing of a venue’s data extraction may fall in the middle of your production run, meaning that not all of the performances within that run will have matured in time for the most recent extraction.
From a box office perspective, a performance may not necessarily “mature” on the day it takes place; there is generally a short period of time following the performance to allow for the reconciliation of agent sales/refunds etc. to be processed before the production is considered “mature.”
Once your "missing" dates have matured, they will be included in the venue’s next data extraction and will appear in Show Stats on the Monday following that extraction, so check back next Monday and your dates should be there.
N.B. Venues set a time-frame for data extractions, most happen weekly (especially those with automated data extractions), but some are less frequent.