It looks like whoever issued it didn't understand what they were stamping. Basically the UDP is just the official translation of your home country license and should only have the endorsements stamped for which you are legally allowed to ride/drive in your home country. I suspect there will be even more errors now the issue of IDPs in the UK has gone from the post office to the corner shop.
How can you get an IDP for a motorcycle if you don't have a motorbike licence in the UK it's not possible. You may have an IDP with the car endorsement on it but that's not an IDP for a motorcycle.
You've clearly not seen the adds where you send money and never hear from them again. Abd I've never heard ofcanyone getting a real licence by paying an agent money as you need to appear in person.
If you already have a license and an IDP you should be able to transfer this to an equivalent Thai licence. If you don't suggest you go to Honda Big Wing in Hua Hin and ask if Honda have a training course in Hua Hin. They do in several big cities and at the end you get to apply for your license. These adverts saying an agent can get you a licence without doing anything are a scam.