I have a similar issue on a similar board (Asus Maximus VIII Ranger)
First, aida64 doesn't show water pump sensor anywhere.
Second, it appears fan sensors are mislabeled. Here is what I believe to be the scenario:
1. Aida shows CPU Fan, it is actually Chassis Fan 1 (or 3)
2. Aida shows System Fan, it is actually Chassis Fan 3 (or 1)
3. Aida shows Chassis Fan, it is actually CPU Fan
4. Aida shows Power Supply Fan, it is actually Chassis Fan 2 (or 4)
5. Aida shows Aux Fan, it is actually Chassis Fan 4 (or 2)
Also see two GPU fans running at 39%. I indeed have two video cards, but they are running on water. Fans are disconnected, confirmed in MSIAfterburner.
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