Two ways to accomplish this.
First, leave Inputs 5 & 6 in the default Digital mode. Do not put the inputs 5 & 6 into analog mode to begin with since you do not plan to use the inputs in analog mode. Apply GND to inputs 5 & 6.
Second, if Indigo does not give you the option to run inputs 5 & 6 in the default digital mode, finish the analog definition by setting the analog trip points to 400 (corrected value) for Off to On and 200 (corrected value) for On to Off. Right now you have established half of the information related to running inputs 5 & 6 in analog mode. Apply GND to inputs 5 & 6.
Is there some reason why the Input 5 & 6 state being On is a problem?
EDIT: I reversed the analog trip point values above. The Off to On should be 400 and the On to Off should be 200.