The daily buys will start immediately. However, you still have old transfers that are on a 10-day hold.
To better understand, imagine your account is a bucket. ACH deposits are flowing in one side, and daily buys are flowing out the other. Due to the functionality of the legacy banking system, these two are not in sync.
Bucket 1: Your old transfers are weekly deposits, each of which takes 10 days to clear.
Bucket 2: Your daily buys are working independently.
Once the transfer clears, the funds in your Swan account will buy your Bitcoin as soon as they are scheduled.
This setup means that if you raise your plan when you switch to daily, you'll start buying Bitcoin immediately but will run out of cleared funds for a week or two before your new higher transfer clears and begins purchasing.
Likewise, if you lower your plan when you switch to daily, you will have leftover funds for two weeks that you can convert using the "Convert Now" button on your dashboard.