Our guild just reached the second wave of the current expedition round and we have placed various amount of garrisons along the path of our first clear.
However, the HP reduction that was stated in the tooltip does not match with the actual HP value the nodes have left. See the below image as an example:
Here we have 5 garrisons on the node, which should have brought the node down to 92.5% in this cycle, but instead it's only 98.5%.