So you made a circle with a path, I see where you struggle 
You need 2 text layers, the one for the top and another text for the bottom
once you made text along path for the top text, you STOP everything!, breath and read below
Now You need to invert/flip the circle made of path, BEFORE the second text or doing anything else.
1 Go to the path tab/dialog, click on the eye to make it visible, THEN go back to the layers' tab/dialog
2 Select the Flip Tool
3 In the Tool Options Select the path (to flip)
4 Select Vertical
5 Click once on the path, JUST ONCE, because it's a circle you won't see it flip (you could make an indent, though), if you click twice it's like you did not click, so click just ONCE
Explanation: it's called a Path, and as a path it has a start and an end..., thus for the second text to not be upside down, you need to flip the path
Then now select your second text and do like the first text
You need 2 text layers, the one for the top and another text for the bottom
once you made text along path for the top text, you STOP everything!, breath and read below
Now You need to invert/flip the circle made of path, BEFORE the second text or doing anything else.
1 Go to the path tab/dialog, click on the eye to make it visible, THEN go back to the layers' tab/dialog
2 Select the Flip Tool
3 In the Tool Options Select the path (to flip)
4 Select Vertical
5 Click once on the path, JUST ONCE, because it's a circle you won't see it flip (you could make an indent, though), if you click twice it's like you did not click, so click just ONCE
Explanation: it's called a Path, and as a path it has a start and an end..., thus for the second text to not be upside down, you need to flip the path
Then now select your second text and do like the first text
Patrice