Why is it that my rule: rule!esc_get_EI_data_by_date_range(todatetime(ri!st

Why is it that my rule:
rule!esc_get_EI_data_by_date_range(todatetime(ri!start),todatetime(ri!end),topaginginfo(1,100)) returns 100 rows of data for ri!start=10/01/2014,ri!end=10/31/2014 [ri!start & ri!end are both date types],
And
my input task output rule: rule!esc_get_EI_data_by_date_range(todatetime(ac!startDate),todatetime(ac!endDate),topaginginfo(1,100)) returns nothing for ac!startDate=10/31/2014, ac!endDate=10/31/2014, [ac!startDate & ac!endDate are both date types]?
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OriginalPostID-125679

OriginalPostID-125679