diff -ur v50/ezmd.py v51/ezmd.py
--- v50/ezmd.py	2020-09-16 21:35:43.000000000 +0900
+++ v51/ezmd.py	2020-09-16 22:20:28.000000000 +0900
@@ -538,7 +538,7 @@
 			if k in tag.prop:
 				cv_to_tbl( tag.prop.get(k), x+1, tbl )
 			else:
-				w = w - x + 1
+				w = gw - x
 				if w > 1:
 					prop['colspan'] = w
 				tbl.v.append( tag_new('tr', {}, []) )