Unfortunately the three wire sensors are difficult to read reliably. Part of the problem is they generate too much click counts per minute. Also there are too many different types we can’t possibly test the controller with all of them.
Negative values are probably a UI bug, because the read count is stored in a unsigned integer variable so cannot possibly be negative. It must be the UI when its displaying the data changed it to signed integer hence negative.
The 2 wire type sensors are more expensive but are more reliable because they generally much less click counts per minute.