dt change inconsistent with run git log

[aekiss]

Run git log can be inconsistent with dt - an off-by-one error?

e.g. see run_summary_025deg_jra55v13_iaf_gmredi6.csv runs 120-122:
git tracking says accessom2.nml changed in run 121: 2019-01-23 04:59:20: Run 121
but dt changes to 1800 in run 122 with no git change

report generated: 2019-02-08T12:22:54+11:00

Run number	Run start	Run end	Run length (years, months, days, seconds)	Run length (days)	Job Id	Failed previous jobs	Failed previous jobids	Run completion date	Queue	Service Units	Walltime Used (hr)	SU per model year	Walltime (hr) per model year	Memory Used (Gb)	NCPUs Used	CICE NCPUs	MOM NCPUs	MOM tile layout	CICE tile distribution	Timestep (s)	MOM barotropic split	CICE dynamic split (ndtd)	ktherm	Common inputs	Atmosphere executable	Atmosphere inputs	MOM executable	MOM inputs	CICE executable	CICE inputs	Payu version	Git hash of run	Commit date	Git-tracked file changes since previous run	Git log messages since previous run	accessom2.nml -> accessom2_nml -> ice_ocean_timestep	accessom2.nml -> date_manager_nml -> restart_period	ice/cice_in.nml -> setup_nml -> istep0	ice/cice_in.nml -> setup_nml -> restart	ice/cice_in.nml -> setup_nml -> runtype
119	2196-01-01T00:00:00	2198-01-01T00:00:00	[2, 0, 0, 0]	731	4960569	0	[]	2019-01-22T08:35:45	normal	8188.24	4.48916667	4091.31964	2.24304805	540.68	1824	361	1455	[48, 40]	roundrobin	1350	80	1	1	/short/public/access-om2/input_236a3011/common_025deg_jra55	/short/public/access-om2/bin/yatm_e8ad3723.exe	/short/public/access-om2/input_236a3011/yatm_025deg	/short/public/access-om2/bin/fms_ACCESS-OM_afe80bfd.x	/short/public/access-om2/input_236a3011/mom_025deg	/short/public/access-om2/bin/cice_auscom_1440x1080_480p_076b14f2.exe	/short/public/access-om2/input_236a3011/cice_025deg	/apps/payu/0.11.2	ed3d9dad15597eb3f9b07624776b3f81df2d6b03	2019-01-19 19:45:24 +1100			1350	[2, 0, 0]	265608	TRUE	continue
120	2198-01-01T00:00:00	2200-01-01T00:00:00	[2, 0, 0, 0]	730	4985960	0	[]	2019-01-22T23:23:32	normal	8689.33	4.76388889	4347.6408	2.38357591	553.33	1824	361	1455	[48, 40]	roundrobin	1350	80	1	1	/short/public/access-om2/input_236a3011/common_025deg_jra55	/short/public/access-om2/bin/yatm_e8ad3723.exe	/short/public/access-om2/input_236a3011/yatm_025deg	/short/public/access-om2/bin/fms_ACCESS-OM_afe80bfd.x	/short/public/access-om2/input_236a3011/mom_025deg	/short/public/access-om2/bin/cice_auscom_1440x1080_480p_076b14f2.exe	/short/public/access-om2/input_236a3011/cice_025deg	/apps/payu/0.11.2	f8643d1bf2a12b5f434f06f58ca8f2f08bd57daa	2019-01-22 23:22:59 +1100	ocean/diag_table	['2019-01-22 23:22:59: Run 120']	1350	[2, 0, 0]	267840	TRUE	continue
121	2200-01-01T00:00:00	2202-01-01T00:00:00	[2, 0, 0, 0]	730	4996353	0	[]	2019-01-23T04:59:32	normal	8834.24	4.84333333	4420.14542	2.42332534	552.9	1824	361	1455	[48, 40]	roundrobin	1350	80	1	1	/short/public/access-om2/input_236a3011/common_025deg_jra55	/short/public/access-om2/bin/yatm_e8ad3723.exe	/short/public/access-om2/input_236a3011/yatm_025deg	/short/public/access-om2/bin/fms_ACCESS-OM_afe80bfd.x	/short/public/access-om2/input_236a3011/mom_025deg	/short/public/access-om2/bin/cice_auscom_1440x1080_480p_076b14f2.exe	/short/public/access-om2/input_236a3011/cice_025deg	/apps/payu/0.11.2	58904916cc09210c5607b24d79b0cd3c1750458c	2019-01-23 04:59:20 +1100	accessom2.nml	['2019-01-23 04:59:20: Run 121']	1350	[2, 0, 0]	270072	TRUE	continue
122	2202-01-01T00:00:00	2204-01-01T00:00:00	[2, 0, 0, 0]	730	5001669	0	[]	2019-01-23T10:05:17	normal	6215.79	3.40777778	3110.0237	1.70505594	552.59	1824	361	1455	[48, 40]	roundrobin	1800	80	1	1	/short/public/access-om2/input_236a3011/common_025deg_jra55	/short/public/access-om2/bin/yatm_e8ad3723.exe	/short/public/access-om2/input_236a3011/yatm_025deg	/short/public/access-om2/bin/fms_ACCESS-OM_afe80bfd.x	/short/public/access-om2/input_236a3011/mom_025deg	/short/public/access-om2/bin/cice_auscom_1440x1080_480p_076b14f2.exe	/short/public/access-om2/input_236a3011/cice_025deg	/apps/payu/0.11.2	58904916cc09210c5607b24d79b0cd3c1750458c	2019-01-23 04:59:20 +1100			1800	[2, 0, 0]	272304	TRUE	continue