Were these single pulls done without overlapping 5 pulls sequence? I”m not sure pull history gives us that info.
For example, you pull for first 5 times, you get 2 SSRs. Now you do 1 single pull and get an SSR. From our point of view, the last 5 pulls got you 3 SSRs but from game point of view, you are still getting 2 max SSR per 5 pulls ( you just haven’t done remaining 4 pulls yet).