This looks indeed like the finger indication.
But Guitar Pro doesn't do that automatically, so it's the author of the tab that chose these numbers, which might explain why they're strange.
It doesn't seem that there is an option in the Stylesheet (F7 shortcut) to remove them.
You can change their position (in the "Notation" tab - left-hand fingering), but I don't see anything to hide them, so you'll have to remove them from the tab "manually", one by one.
Yeah, that sucks.
To remove them, select the note and on the left panel, click on the "left hand" icon (on the same row as hammer-on / pull-off buttons) and click on the circled number.
But you're right, it should not be displayed like it is on your tab.
With the finger notation you rarely indicate all fingers you use, only the more relevant / unusual ones. So, with the options set up like yours, it's unusable. With the right set of options ("standard" notation displayed, position on staff before the note), it's much more readable as the number is next to the relevant note.
It looks like an after though from Arobas, poorly implemented, with options missing (you can't even change the font). I'll send them a little feedback :).