Mac Address Table Question

[John Rener]

Need your guidance network gurus. 

Is it normal to see a mac address sitting on multiple ports and vlans?

[Julio E. Moisa]

Hi 

Are you using port security?

[John Rener]

Hello Julio,  No,  port security isn't configured.

As I was posting this, I was reading some article, and the answer might be Yes to my own question. But I am more than welcome for some type of clarification.