Answer from Liz, Aurorasaurus team. We have looked into this issue and hope this answer helps.
When you enter text of your location on the form to report an observation, a drop down menu should appear from which you select the location from a list of choices. The choices are Google place names and many formats are accepted. Sometimes it appears this drop down menu may not appear or the user may be unable to select it. This may be a browser or connectivity issue and we are looking into it. This appears to be a rare occurrence that may come and go so it is difficult to track. Any difficulties using the site can be reported on this form http://www.bit.ly/aurorasaurus-web-bug or ask a question on this page. This will help us improve performance for our users. Thanks and sorry for any inconvenience!