Happy you found the answer, for completeness I am including my answer I already sent you via mail:
Hi. The reason for this is the way you defined the scale. The unison 1/1 for note 1 is always implicit. So by defining it again you created this double note. Have a look at other scales, the initial 1/1 is always missing. This is how scales are defined in scala.
So your scale should be
Note count: 5 (it is pentatonic after all)
01: 9/8
02: 4/3
03: 3/2
04: 16/9
R: 2/1