We are trying to get an accurate number of action takers on specific alerts in a set period of time, and we are having a bit of trouble as pulling this in two different ways is leading to two different results. The number for Response Count in the Action Alert Summary report is larger than the number of survey responses that we downloaded from the Action Alerts tab.
The reason you have more alert responses than survey submissions is because each constituent can only have 1 survey response for an action alert. If an action alert is submitted multiple times, then it will simply overwrite the survey response, but it will not add an additional response. The Action Alert Summary report is showing the total action alert responses, including constituents that submitted multiple times.