We set the start & end dates used for resummary for GCP in the create_daily_archives function here:

• https://github.com/project-koku/koku/blob/main/koku/masu/external/downloader/gcp/gcp_report_downloader.py#L95

However whenever the GCP downloader downloads data with more than one invoice month we overwrite that date range.

Therefore the date range we pass back only contains dates for the last invoice month in the for loop.

A breakdown of this problem is that we overwrite the date_range dictionary whenever we receive a csv file that contains more than one invoice month due to this for loop:

for invoice_month in data_frame["invoice.month"].unique():