I gather you want to change some formatting in the mailmerge output, but I wonder why you're not handling that via field coding as part of the merge itself. That way, everything would be handled in one go and you wouldn't need the macros.

Your macros are also strange on their own account - I can see no reason for having single-element arrays and loops to process them. The whole lot could be handled with a single macro using either one of the existing loops or simply a sequence of F/R expressions.