You can't add the following task:
Update !!4OH!! marketing pack
The 4 is stripped out leaving:
Update OH!! marketing pack
This happens because !!4 is a shortcut to set priority 4 (the default "blank" priority), you can try !!3 or !!2 or !!1 with the same results.
To avoid that, please use spaces between the syntax and the text so, for example:
!! 4OH !!
will work correctly. Note - there's also a keyboard shortcut for that - Ctrl+B, if you'll use it on a selected text, the syntax will be added automatically and it will include spaces around the text :-)