imho - a 10 second difference is not an issue. The only place where time might be an issue is when a timestamp is generated for a volume group.

However, your application might not have liked a 10 second reversal of time.

In summary, it is good that you go it corrected, as I am only saying that 10 seconds is not likely to be an issue. Once you get above 30 seconds (opinion here, no hard facts !  ) you are getting into a more risky situation.

One way - say the poor mans way - to sync time over several systems is to run the AIX command setclock - and choose a common reference. I used to do this in classrooms because students would, by design, change the clock settings (exercise with the date command) and sometimes the year or month would be incorrect.