S8 video would show you the working of the machine
S8 autoset shows efficacy data AHI (AI,HI) , pressure and leak.
11.6 is the 95% percentile pressure. You were at or below 11.6 for 95% of the night (higher for 5% of the time)
Try to increase the minimum pressure slowly and keep an eye on the 95% pressure and adjust the upper pressure to 16 not bad idea. Resmed machines report mask leak (unintentional leak) and define large leak above 24 L/min (above the red line on the Resscan leak graph). Its ideal to be lower than 24 L/min as higher leak rate can affect the accuracy of data and the therapy.