BED-OSU pulled up 3 choices, a Beech400A, Challenger300, and a G650. The Challenger and G650 couldn't use OSU, but that wasn't called out quite explicitly enough (IMO), and each chose a different alternate airport, neither of which chose CMH, which is overwhelmingly the logical alternative (IMO).
Similarly, booking that same trip from LWM only offered the two larger aircraft, with a departure alternate of ORH (rather than the closer and more sensible BED).
Our other common trip is to 60J, and the site chose ILM as the alternate (rather than CRE or MYR).
Realistically, you may need to start with street addresses to better inform the alternate airports. It's often the case that a charter customer won't know the possible airports, and blindly choosing an alternate without knowing where the customer wants to be is playing that game one hand tied behind your back.
Searching 8pax OSU-LAS in the middle of summer, I was offered a Hawker 800 departing OSU non-stop to LAS. To say that's a snug departure is an understatement; I doubt that would be a balanced field departure and under Part 135, that's going to be a no-go I'm pretty sure.
I also wasn't getting offered turboprops for some of the short searches I did. Makes little sense to fly a jet on a <30 minute hop generally, but that was all I got in New England for the searches I did.
You're trying to disrupt a market that's pretty difficult technically to make fully online. I suspect you're going to get a lot of bookings that end up not flyable as offered (and still have some work to do on the alternate proposals). Similar to dbenj's feedback, I also think your pricing is well above market, especially with jet fuel as cheap as it is now. That'll be easy for you to fix though.
I definitely wish you guys the best of luck, and happy to give any additional feedback if you want it.