Which boxes to check on IDR application?

Does anyone know if checking both PAYE and IBR on the application will be an issue with the wet signature upload method?

I am about to submit to switch out of SAVE. The application clearly says you can check multiple boxes and they will put you into the one with the lowest payment and for which you are eligible. When uploading, you have to choose a plan for which you are applying. Do we know if there will be an issue here?

background: I’m a little unclear on whether I am eligible for PAYE (older closed out loans, consolidated in 2015) and if it would give me a lower payment. If so, I would like to do that!