That’s a lot less busy. 
But why are Robert’s blocks spanning both arms of the chromosome? I’m glad you removed the M/P/U is probably a good idea too. The U (unknown) was crashing the Gramplet. And if parsing fails, it bomb gracelessly too. (I had an extra CSV value per row from my FTdna import.) If the “Association Note” parse fails, shouldn’t it just ignore the Note?
I was looking at the overall lengths. According to the karyotype idiogram spec, the chromosomes are always charted in deceasing length… except for 21 & 22 and the XY (or XX) at 23. So that means that at least 10 and 19 are rendering incorrectly.
Could you check the program defaults for the chomosome lengths?
I was thinking plotting the Centromere might make a nice overlay that implies chromosomes better than just parallel bars. I finally found docs that list the overall standard length, the centromere loci and the difference between those same values for the XY and XX The graph for male has Y (instead of X) as the 23rd and a short arm.
