Well, that depends how you read it, to concatenate means to link or join together, so yes it is concatenating as i wanted to "join" two THIS_SCRIPTs.
As for what i'm trying to acheive, i wanted to only show a variable for all pages except "subscription" and "search
The second part of my message shows that i've done that, it was really late when i first posted, i then thought i'll just try the AND operator and it worked, i wasn't thinking too clearly at the time, KH99 pointed out why, i should have seen it really.