Question
What do zero values such as "0.01" mean for the positions?
Answer
Ranking values starting with "0." are universal search rankings, such as Google Maps, Google Shopping, Google Images or Google Products.
The zero before the comma indicates that the e.g. Maps result can be found above the organic search. And the 01 after the comma indicates that it is the first Maps result. 0.03 would therefore be the third result etc.
If you do not want Universal Search results to be displayed, you can tick the keywords at the front and then select "Change Universal Search settings" under "Select action" at the bottom.