Mighty Mouse sudden scroll issues on Mavericks

My bluetooth Mighy Mouse (a little ancient, but still works well for me) was functioning perfectly till suddenly the vertical scrolling increased speed rapidly, followed shortly by the horizontal scrolling failing completely. This all happened after an episode of letting my battery die to the point of power down, me plugging in the Mac, giving it a few minutes to boot only to find everything very slow, then doing a restart. Upon start up, my Mac returned to being its normal speedy self, but this Mighty Mouse issue occured.
The settings in preferences -> mouse are ''lowest scroll speed'' and "vertical and horizontal" scrolling
I have reset the SMC and PRAM. This did nothing.
Any suggestions???

Thanks for the suggestion, I didn't know of that preference item.
But changing this did not help, in fact it seems to coincide with the System Preferences>Mouse>Scrolling (change one, and the other changes too). And changing this scrolling setting anywhere from low to high doesn't seem to change my current scrolling speed. It is unregulated.
I should also mention that I have two bluetooth Mighty Mice and one corded Mighty Mouse. All of these have super-fast vertical scrolling and NO horizontal scrolling.
Also, when resetting the PRAM, it is an obvious restart. When resetting SMC, is there any visible/audible cues that the reset has occured? I just want to rule these two possible solutions out.

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Mighty Mouse sudden scroll issues on Mavericks

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