I had searched ammo using their online tool and it had shown the same ammo items in stock for weeks when they clearly weren't (the .22 you were mentioning) I honestly do not think it was being updated at all, or the supply was running out so quickly that it never had the chance to be.
When it WAS working before the panic, I found that it was usually a day behind. I would go when it said out of stock and the exact ammo would be in stock. Check online the next day and it would then say in stock only to go visit that same day to find it out of stock. It was never real time in my experience, and my experience was with the three stores in the Santa Clarita Valley.