RTE instead of completely removing all formatting associated with heading only removes line feed leaves tags for color & bold

Insert line 1 of text into RTE
Insert line 2 of text into rte, highlight text and use ctrl-6 to make it a heading
Use backspace key to back from beginning of line 2 to the end of line 1

Look at the wiki markup. Line 2 will have tags around it for color and an asterisk for bold.