Is the balance not updated in real time and only the next day to include your successful survey's earning?

After a few successful surveys did not post (those were led from initial non-successful survey then eventually one fully completed but miles not posted), I started to make screen shots of high value surveys and the completion screens, and checked the account activities after completion.

Today I notice that the account balance does not change even though the successful survey did post. (an improvement from a couple weeks ago). I never pay attention to this so not sure if this is always the case. So I need to check tomorrow to make sure the balance is updated.