Question about PROC BOXPLOT appearance

[PaigeMiller]

Code used:

proc boxplot data=combine1;

plot x1*seq/turnhlabels boxstyle=schematic cboxfill=lightmoderategreen vref=40 cvref=red lvref=21 npanelpos=70

  boxwidth=1 clipfactor=16 clipsymbol=square cclip=red html=alt;

label seq='Lot in Package Test Date Sequence';

run;

Output destination: HTML

SAS Version 9.4 TS1M2, Windows 7 Professional 64 bit

Why do my boxplots have red squares at the ends of the "whisker", those should be only used as the clipping symbol; and furthermore why do the boxes at the right of the plot not have these red squares?