Fat55, given that you're working in Word the problem is relatively
easy to solve.
Simply use the global search and replace function. You can get to this
by clicking Edit on your top menu bar, then Find. The shortcut to this
Click the More button so that you can see more options, then click on
the Special button at the bottom of the dialog box. Choose Paragraph
Mark. You'll notice that ^p has appeared in the Find What box. This is
the special code Word uses for a paragraph mark.
It sounds to me like you want to replace instances of two paragraph
marks together with only one. Choose the Paragraph Mark again or
simply type another ^p so that there are now two of them.
Then click on Replace and put a single ^p in the Replace With box.
Clicking on Replace All will replace every instance of two paragraph
marks together with one. Alternatively clicking on Find Next and then
Replace will take you through each instance one at a time.
If you wish to change back to the former, just use the Undo option by
clicking on Edit and then Undo Typing.
This should do the job for you. If so, should I post it as an official
answer? If not, please explain why and I'll finesse the answer further
You should have a Clarify button but if you can't find it, simply
adding a comment should do.