Hello Jimmy and thanks for your reply.
Unfortunately, I couldn't get the method you suggested to work. However, you did put me on the right track with your reference to margins. What I did was set the L2 left group margin to 38px in CCSMW and this corrected the problem. Having tested my site in a browser, everything seems to work OK. I’ve attached a screenshot that you may (or may not!) find of interest but it does show the affect of what I did.
Thanks for your prompt reply and guidance, Jimmy; really appreciated.