API Filters not returning all PRIME Awards and Subawards

[KC-Prospero]

We are using the following API filters, and we noticed that when we compare the counts of the primary awards and the sub-awards returned from the API filter to the bulk downloads, we are missing many awards and subawards. For example, we typically see about 200K+ subawards per year, but when we use the following API filter we only see a count of about 16k+. Something is wrong with how we have set the filter. We've spot checked the cases from the bulk download, which produces much higher counts, and we are missing records when comparing to the results we get from the API filter. Are we applying the filter for the bulk download to the API, expecting to get the same results, or does the API filter need to be altered in order to extract all the primary awards and subawards for a given time period?

"filters": {
"agency": "all",
"prime_award_types": [
"IDV_A", "IDV_B", "IDV_B_A", "IDV_B_B", "IDV_B_C", "IDV_C", "IDV_D", "IDV_E",
"02", "03", "04", "05", "06", "07", "08", "09", "10", "11", "A", "B", "C", "D"],
"sub_award_types": ["grant", "procurement"],
"date_range": {
"start_date": start_date,
"end_date": end_date
},
"date_type": "action_date"
}

Any and all suggestions are welcomed!