What are your equipment settings? Specifically your hourly boil off, mash tun volume loss, grain absorption, kettle trub loss? All these contribute to the pre-boil volume and consequently to the amount of strike water needed. Make sure they are correct and if you are comparing to other calculators make sure the assumptions are the same for both tools.
The results your getting seem high but I suspect one or more of the above inputs is also high and that is causing your problem.
If you think you have a bug I suggest contacting the ibrewmaster support through the app. They are pretty quick to respond and helpful.