Change of cycle

Hi everyone, my periods have just regulated back to 28 day cycle following the birth of my son. I'm having trouble because I can't seem to make the glow app understand that the cycle is no longer over 30 days. This makes it really tricky for me to map anything out. I have changed my cycle length in the settings about myself, but it is still predicting my period on a 33 Day cycle. Does anyone know how to fix this please? If I can't fix it, the app is not really much good to me!