Sounds to me like you first arrived on a visa exemption, then went to Laos and got a tourist visa for 60 days and a 30 day exemption to make the 90 days.
Then you tried for a second one but were refused so had to come in on a further exemption which you are now on amnesty with the extension you got.
Easy to check what your visa is - just look in your passport and it will say what you had! :-D
If you are still in doubt, post a photo of the visa here and someone will soon tell you if you still don't know!