I had some free time today so tried to upload all my "done at home" and "done at the mechanic's" service records into the Toyota site. After putting in a bunch I pulled the full service history and found that it had accepted the first 5 and ignored the rest - without putting up any kind of warning. Thanks for wasting my time Toyota! Does this site have a "5 per day" limit on these sorts of records? It could also be a glitch because all the records it dropped were more recent than the last record it already had. I also noticed that most of the work done under a warranty (from when the car was purchased used) at Longo were not present in the log. But a couple were. Strange.
I can not answer your questions. I do know that anything that you add can only be seen by you. If you sell the car in the future, the new owner will not see what you entered. So, I do not take the time to enter the maintenance that I or my local mechanic does. I just keep written records for myself.