I keep have devices that arnt on my network show up in gray. Its always the end ips of the subnet like .253 .252 etc. Any one else have this happening
so noone else having ghosts? I also notice that machines using dhcp get the name of the last machine to have that ips address also
no such isue here
Here is a pic of what i mean. All the gray one in the middle. they Dont exist. I keep Deleting them but they always come back

if it finds it, they must exist. try to ping one of them or connect to them
please look at this post:
http://forum.mikrotik.com/t/my-dude-keeps-chrashing/3897/3
that should answer your question.