I think that's just showing you example values from your data set. However, when you click on a single row on your worksheet, it will only pass that record's ID to the URL. You have to CTRL + click different items to get the multiple values to be passed. See the following article for further details (search for "Allow Multiple Values" to go to that specific section): https://www.theinformationlab.co.uk/2018/03/18/url-actions/
Hi, just following up on this to see if we've addressed your question or you have additional questions. Please advise.