Do you know why the 1st value from
df = ld.get_data(universe = ['LSEG.L'],fields=['TR.TSVWAP(CALCMETHOD=SUM,POINTS=2,Frq=D,SDate=0,EDate=-40)'])
and
df = ld.get_data(universe = ['LSEG.L'],fields = ['TR.TSVWAP(CALCMETHOD=SUM,POINTS=20,Frq=D,SDate=0,EDate=-40)'])
are the same (in this case 8954) when one should be the sum of the past 2 days of data and the other should be the sum of the past 20?