e mail notifications ;should I still receive them?

I am following some victims" threads on here and have set the threads TO "watch topic for reply"; however, in order to continue to receive notifications is it necessary for me to be logged in and visit the topics to keep the notifications flowing?

No

Once set a notification will stay active - BUT - once a notification email has been sent to you, it will not send another (for subsiquest replies) unless you have been back to the forum between times.

thanks Chris

so I need to log in to keep the mails going?; I thought it rather strange that I had not been notified of a rely to a thread I am following
(seems a bit like the notifications on computer trouble)

should be identical to CT - they use the same forum software.