If I'm interpretting you correctly I believe you're dealing with multiple
MACROBUTTON fields in a table cell. If there are others to the right of the
one you're completing they will get pushed further to the right and seem to
disappear until the *entire* field is forced to wrap to the next line.
You can either: a) press Enter, b) press Shift+Enter, c) press Tab, or d)
keep typing. Any of these options - as well as others - will necessitate
restructuring of the layout, tabs, etc. The amount of content you're typing
exceeds the allocated space - which isn't very much in either of the
templates used by the wizard.