“Invested” refers to the allocations from the last rebalance date (typically, several hours after close on the last day of the month). “Actual” is the allocations based on the most recent closing prices. “Actual” can be useful if you want to rebalance on a different date, such as before close on the last day of the month or a week into the normal rebalance period.
The unadjusted closing prices are available immediately after the markets close. However, adjusted prices, which adjust for dividends and stock splits, can take several hours to update, which is why we wait until a few hours before the next open to generate our monthly rebalance allocations.