It appears that the low watermark and highwatermark columns are interchanged. Further, on some occasions, the data itself doesn't make sense. @carns discovered the following issue:

Margo diagnostics

#Addr Hash and Address Name: 18446744056162363849,na+sm://365924/0

Thu Aug 27 13:40:19 2020

Function Name, Average Time Per Call, Cumulative Time, Highwatermark, Lowwatermark, Call Count

trigger_elapsed,0.000000086,0.056649923,0.000000000,0.000028849,655365 progress_elapsed_zero_timeout,0.000000158,0.020703077,0.000000238,0.000006199,131073 progress_elapsed_nonzero_timeout,0.000000968,0.126827478,0.100276709,0.100276709,131073 bulk_create_elapsed,0.000000091,0.011901140,0.000000238,0.000016689,131072