Failed Drives Replaced, SMART tests scheduled, but not running on new drives

[thedirtmerchant]

Not sure what the problem is (obvi).
On/Around July 14th I replaced 2 drives (ada3 and ada5) and
On July 15th Short tests were run (report output screenshotted)

Device	Serial Number	SMART Status	Temperature	Power-On Hours	Start/Stop Count	Spin Retry Count	Reallocated Sectors	Reallocation Events	Current Pending Sectors	Offline Uncorrectable Sectors	UltraDMA CRC Errors	Seek Error Health	Last Test Age (days)	Last Test Type
SMART Status Report Summary
/dev/ada1	WD-WCC4N1ZK03JV	PASSED	30��C	35202	50	0	0	0	0	0	0	200%	1	Short
/dev/ada2	WD-WCC4N2VRX064	PASSED	31��C	35202	50	0	0	0	0	0	0	200%	1	Short
/dev/ada3	WD-WX51D89KS166	PASSED	27��C	799	7	0	0	0	0	0	0	200%	1	Short
/dev/ada4	WD-WCC4N2YJV3S8	PASSED	27��C	15443	20	0	0	0	0	0	0	200%	1	Short
/dev/ada5	WD-WX61D89A8U87	PASSED	27��C	799	7	0	0	0	0	0	0	200%	1	Short
/dev/da0	WD-WCC4N1ZK0HKS	PASSED	28��C	35202	51	0	0	0	0	0	0	200%	1	Short

But, week by week, the "Last Test Age" increases for the new drives, and SMART tests are run on the other drives.
Did I miss a setting somewhere?

Device	Serial Number	SMART Status	Temperature	Power-On Hours	Start/Stop Count	Spin Retry Count	Reallocated Sectors	Reallocation Events	Current Pending Sectors	Offline Uncorrectable Sectors	UltraDMA CRC Errors	Seek Error Health	Last Test Age (days)	Last Test Type
SMART Status Report Summary
/dev/ada1	WD-WCC4N1ZK03JV	PASSED	31��C	36113	50	0	0	0	0	0	0	200%	1	Short
/dev/ada2	WD-WCC4N2VRX064	PASSED	31��C	36114	50	0	0	0	0	0	0	200%	1	Short
/dev/ada3	WD-WX51D89KS166	PASSED	27��C	1710	7	0	0	0	0	0	0	200%	39	Short
/dev/ada4	WD-WCC4N2YJV3S8	PASSED	27��C	16354	20	0	0	0	0	0	0	200%	1	Short
/dev/ada5	WD-WX61D89A8U87	PASSED	26��C	1710	7	0	0	0	0	0	0	200%	39	Short
/dev/da0	WD-WCC4N1ZK0HKS	PASSED	28��C	36113	51	0	0	0	0	0	0	200%	1	Short

Short & Long Tests are scheduled for all drives, including ada3 and ada5. And SMART tests are enabled.