It is a mistake to assume that all gas prices end in 9/10. Gas in Canada is sold not in dollars, but in cents. For example, gas may be listed at 124.9. Wazers can correctly update it to 1.249. But if that price is 125.0, the closest it can be updated to is 124.9. Another Wazer may see that as incorrect and change it to 125.9 It is not at all uncommon to find gas with prices ending in .4, .5, even .0.
I have witnessed long lineups at competing pumps where one station is charging 3/10 of a cent less!