application missing from purchases

I bought an app a year or more ago that now doesn't show up in my purchases. I want to download that app to my second iPad, but i can't find it in either of my itunes accounts. I am signed in the same acct on both iPads. (though I also checked my one other account to see if it was there. It's not.)

On my first iPad, it's called "Phonograms" and the company that makes it is Logic of English.

When I search for it on the app store, I can only find "Phonics with Phonograms by Logic of English" and it doesn't give me the download symbol, it wants me to buy it. Both the program I own and the one for sale share the same icon (which looks like an "i" with a smile above it).

I have contacted the company and they told me it's the same app and that I should contact apple.