Thanks for the input. Hitting it right on the head (not missing the point).
But not related to a ctrl+enter or an enter.
I write or modify a box in visual mode, put the cursor at end of the last line, clean up everything after (delete or backspace, leave the box or save it … bam … one or more extra lines and  ’s were inserted.
Do the same in text mode, same result. Dawned on me might even be a browser/chrome extension. Going to try Safari, Firefox, etc. If resolved, disable all in chrome, then one by one. If not, only have a few word plug-ins, but with deactivate as well.
Appreciate your help, will let you know what turns up. Thanks again. Best, David
Put the cursor at the end of the paragraph and hit delete until nothing left. Press save and each time it displays with the blank lines, intermixed with one or more   afterward.