[O] Blank lines after headline and before :PROPERTIES: etc

[Charles Millar]

Hi,

I am not  a programmer, coder, whatever, and realize that many of you 
are used to inferring certain conditions by examples given in manuals, etc.

Is it stated anywhere in the Org manual that blank lines are not allowed 
after headlines or certain other elements. If not, could such 
"enlightenment" be added to the manual? As an example,

* This is a headline
:PROPERTIES:
:EXPORT_FILE_NAME: /path/to/exported/file
:END:

works as expected whereas

* This is a headline

:PROPERTIES:
:EXPORT_FILE_NAME: /path/to/exported/file
:END:

exports to a file with the buffer name.

(The above sometimes occur when I kill and yank the properties block.

Another example would be the necessity that a table immediately follow 
all elements that are used to format and generate a table.

Charlie Millar