Inflight fuel calculation error – Sporty's E6B Flight Computer Review

So I have an issue when calculating inflight fuel burn (using the inflight fuel per hour). When I set it to 4 minutes using a fuel burn of 5.75 per hour I get 86.2 gallons. That's clearly not right. Like others have said, density altitude is off and so are several other functions.
Review by Nsn141 on Sporty's E6B Flight Computer.