The NHC reference was actually to the length of time in a tropical storm intensity or higher for a storm that occurred entirely in the month of July (I.E., July only). That 1916 storm actually only had 51 bulletins issued on it.

The 1909 July/August storm became a TS on July 27th at 06Z and stayed at that intensity for 14.25 days - but Bertha should easily exceed that total as well. I suspect that Bertha's total number of bulletins is going to get very close to 70.
Cheers,
ED