Motion Path not showing in command enter preview

I have created a series of motion paths so 3 different arrows travel across the same line. To do so, I've created 3 layers (arrow_1, arrow_2 and arrow_3) and a guide layer for each. I copied the path I drew for the first guide to the other two so that each arrow follows the same path. On the animate application itself, the arrows follow the line one-after-another perfectly (with black path still being visible). To remove the black line/view the clip without the line, I "command entered" to open the preview that takes me to a web page. In this web preview, only the first arrow follows the path now - the others just move directly from the original spot to the end spot (in a straight line - not across the curved path).