If I were only cutting once per week in May, I’d have to double cut, too. Sometimes weather restrictions force that, but I normally try to mow every 3-4 days in spring. By late June, that slows way down, and I can often go July 4 - August 15 with just two or three mowings over a six week stretch, but our grass grows more than a half inch per day in spring.
Figure 4” cut height, half inch per day, you’re cutting 6” down to 4” after four days. That’s the recommended 1/3 maximum recommended.
If I let my lawn go more than four days in normal spring weather, it looks like I’m preparing to bale hay, after cutting.