iCloud not syncing properly between devices?

[WillFisher]

I have a few problems here actually, the first being that reminders can be created on one device, ML Macbook Pro, iPad or iPhone and it'll be there, but if I check it off, it doesn't check off on the other devices, is this how it is or is it not syncing properly?

I've also noticed that my PhotoStream NEVER resets, I have to delete it myself. I've tried turning it off and on again on all my devices, but it does the same thing over and over. I believed it was meant to reset after 30 days?

I might be wrong and just picky about both these things, but is there a fix for either of them?

All iDevices on iOS 6 and Mountain Lion is fully up to date.

Thanks everyone for the possible help!

 

[iRobby]

In my experience it does sync between devices but not auto it only syncs on other devices once you open the reminder app or reminder on the other devices.

 

[HazyCloud]

Be glad that PhotoStream isn't currently resetting. Think of it as a backup in the event you accidentally delete a photo.

And the above poster is right about Reminders. Just pop open the app and they should sync just fine. If not, try turning off Reminders and then turning it back on. This will cause it to ping iCloud for new info.