Resqu2, are you using beta versions of iOS on your watch or iPhone? I'm just curious if that's a normal thing for you (to get 3 awards a month), or if it's just a one time only glitch sort of deal.
For me, I don't wait for notifications of new goals. I reboot the iPhone and Watch about 5 minutes after a new month starts so I can see what my two goals/awards will be that month. My only guess for how people end up with weird awards (0.0 miles, 7.4 miles) or no awards are because they are running jailbroken devices, beta versions of operating systems, don't reboot their devices, maybe won't get their new monthly goal (or the individually assigned one) due to once they miss one day of "do this every day of the month" the monthly goal/award/achievement disappears from their Achievement screen on their phone.
I used to be in the beta programs, but for me it's not worth losing my current streaks to try new operating systems a few months before they come out.
Hopefully watchOS 5 better handles notifying users of their monthly goals, but I'm not taking any chances. I'll always restart my devices 5 minutes after a new month so I don't miss reading that I need to hit the 400% goal every day of the month.