I think the only way you are going to be able to solve this problem is to transmit a byte that indicates the framing of your data. It may not need to be "A", A's data, "B", B's data, "C" C's, data. But a single byte at the beginning of all the data.
Start Byte, A's Data, B's Data, C's Data.
That way you discard all data until you see the start byte, and you know that all data after that is lined up in order for each of your sensors. One problem you may have is that if any sensor's data could have the valuse from 0 to 255, then there is no unique byte you could use as an indicator that the data is starting. Your indicator byte would show up by chance among the normal data stream. However, if you do the first method, you should be able to decode from a handul of bytes which are the indicator bytes and which are data.
One other thing. I don't think you are using the millisecond timer correctly. You have a 100 value wired in (make it U32 to get rid of the coercion dot.) You have a wire coming out to your multiplication. But that blue wire is not 100 but will be the current value of the internal millisecond timer, which is generally a very large number. Put an indicator on that wire. Look at it while running and you'll see what I mean. Take a branch off the 100 constant before th millisecond timer and use that in your math.
