On some occasions, the primary and secondary release types are transposed.

Using this file naming convention:
$if2(%albumartist%,%artist%)/%album% [%totaltracks%,%media%] (%releasetype%, %releasestatus%)(%originaldate%)/$if($gt(%totaldiscs%,1),%discnumber%-,)$num(%tracknumber%,2)$if(%compilation%, %artist% -,) %title%

Some examples are:
Blink/Flyswatter [8,Cassette] (demo; ep, promotion)(1993-05)

and

Kyuss _ Queens of the Stone Age/Kyuss _ Queens of the Stone Age [6,CD] (compilation; ep, official)
(1997-12-05)

The %releasetype% tag is returned as demo;ep and compilation; ep respectively when the expected behavior is ep; demo and ep; compilation

I am including a screenshot of the picard output for the second example (Kyuss _ Queens of the Stone Age)