Hello @ShawnaA19 ,
When exporting your registrants, are you going to the registration list and clicking the "Download CSV" link above it? That will only provide the most basic info - mainly meant for checking in and similar quick functions.
For a full report of your registrants, including responses to different questions in the form, go to the Reporting sub-tab of your Event (next to the Dashboard sub-tab), and select the blue Export Report button. You can select the Full Report option, or Custom Report if you only want specific details. I was able to download the Full Report and see all registrants' details without any issues when using that option, though I did obviously have to expand the columns' widths to accommodate all the info in the cells. Are you not seeing all your registrants' info when doing the Full Report?