The (now) old PS2Controller kext from Dr Hurt (version R6 compiled by Bronxteck) for Alps touchpads should work Ok on the E7450 platform. Certainly did on all my old Sandy Bridge to Broadwell E Series laptops: E6220, E6230, E6440 and E7250. Said kext is available in our R&D->Kernel Extensions forum section and in my E7250 guide.
try this one, you'll lose gestures but hopefully fix the jumping issue. 2 fingers scrolling should still work
Pay attention to the plugins inside the kext, no voodooInput.kext, so change config accordingly
VoodooPS2Controller-Alps.kext.zip