Hello,
I'm a college student just becoming familiar with all of the facets of GIS software. I have a lot to learn so bare with me.  I'm currently doing a project that calls for me to obtain lat/long coordinates from a website.  What I did was right click on the tables shown in the website and exported them to excel.  Now I have my data.  I go into ArcMap to add the XY data. (File>Add Data>Add X,Y data). Once I add my data (excel sheet 1) it comes up in the T.O.C however on the map itself it appears only as one point.  Rather than, oh i dont know, the 200 different points included in the excel table data.  I do not know if it is because I'm not using the right projection or coordinate system or if the points need to be converted into a different format or what. I have never used these forums before so I guess I'm being pretty vague until someone responds to this thread so I know that it works. Someone please help!!! This is my final project for school!! Thanks.