I can't read Oriya at all so I can only guess what is wrong here, but the first thing to do is to see which paragraph composer you're using, and to try setting the composer to the World-Ready Composer (assuming you're not already).
1) Select Oriya text with the Text tool
2) Hold down Control + Alt + Shift and hit J
3) In the Justification dialog, look at the Composer setting:
You want to set it to the "World-Ready Composer" setting.
If the paragraph composer is properly set to World Ready then another thing that you can look at is the font ligatures, make sure the font applied does support ligatures and that they are turned on
I've read about Shree-Lipi many times, but I have never actually seen it in use.
It looks like you're trying to type three characters, but you're actually getting eight characters, right?
Does it type correctly in another app like MS Word?
Is there a reason you can't use your OS keyboard? I typed this using the Odia keyboard built into Windows 10:
Sorry, I couldn't figure out how to type the third character correctly. Oops!