Adding tooltip summarizes data in ArcGIS maps

Hello,

The data I'm working on is from a GPS sensor, and contains Time (h:mm:ss tt format), Latitude and Longitude columns. I'm trying to plot the coordinates using ArcGIS maps. The goal is to have each point represent a distinct record in my data so that I can trace the path the vehicle is traveling.

I have set the appropriate data category for latitude and longitude and dragged them into the respective fields. Everything looks fine until I include the Time column in the Tooltip. Once I do this, the circles representing the coordinates reduce in number and each circle now represents several records. Same thing happends when I use any the color/ size features too. Could anyone plese let me know how I can resolve this?

Thanks in advance.