You said you are using Finite sampling. Why aren't using continuous sampling? Finite sampling means it starts and stops every loop iteration, but the real world is still generating data while the PC has moved onto other tasks that take about 25 msec after it grabbed the last sample. With continuous sampling, the task is still running and the buffer collecting the next data coming in in series, while the PC moves onto the other tasks. Next iteration, it grabs the data that has filled the buffer, (and waits if it hasn't all arrived yet) then moves on. You won't "miss a drop".
You should also use queues and a producer and consumer loop to move data between loops. Using local variables means you could miss data, or read duplicate data since you have a race condition for when data is written to or read from the terminals and local variables.
You have some other issues you'll need to fix. Be sure to use block diagram cleanup to clean up those wires that wander all over the place. Also, you have a For loop where you flip a 1-D array and repeatedly insert it into the original array. That doesn't make any sense to me. It just dramatically enlarges the size of the array repeated data in odd locations.
