Macrium Reflect Free v7.2.453 Scheduling glitch?

I have MR scheduled to do a full backup on the 1st monthly at 08:00 hours and today it created the backup successfully. The log shows it timed at 08:00:04 but 1 hour later it created a 2nd successful full backup timed at 09:00:02. This second backup is not in the schedule so the only thing I can think of is that MR "forgot" the first backup (even though it is in the Log file) or that it "thought" I had only just switched my computer ON just before 09:00 hours and missed the scheduled 08:00 "Start time". I should say that the computer had been ON all the time from 07:40 until 09:45 (well after the second backup completed) and never entered sleep mode.

This is the first time it has happened. The computer clock time is set correctly.
Is this a known MR glitch? Maybe related to the latest version of W10?
My OS is Windows 10 v1909, build 18363.476.
Has anyone else had this problem?

Thanks in advance.

Our clocks were put back 1 hour on Sunday 27th October. There has been two full successful backups created since then and each time only the one backup was created.

The next backup is scheduled for 15th December so I will see how that goes. I know I said in my original post that I backed-up on the 1st monthly but that was to keep things simple. MR is also scheduled to run full backups on the 15th monthly at 08:00 hours and this has never been a problem.

There are two tasks in the task scheduler: - One is for the 1st monthly 08:00 backup and the second task is for the 15th monthly 08:00 backup.

Looking more closely at Task Scheduler (TS) for the 15th November 08:00 backup: -
I see a discrepancy between what Win10 OS reports and what MR reports.

TS shows the "Last Run Time" as 09:28:02 and MR shows the time as 08:00:03 (and it took 17min 58secs including auto-verify so probably finished at 08:18 hours).

I know that the backup ran at 08:00 hours so it seems that TS is not reporting correctly. Maybe this is confusing MR?

As long as the glitch doesn't happen often then I can live with it and simply delete the extra backup. It just means that I can't shut down the computer while it is making the second (unwanted) backup. Other than that all I can do is what you suggested and re-create the xml schedule file. Maybe a future MR update will fix things.