Your avsp log:
SwitchRes: v0.017m, Monitor: custom, Orientation: horizontal, Modeline generation: enabled
SwitchRes: Monitor range 15734.00-15734.00,59.94-59.94,3.253,4.700,6.507,0.191,0.191,0.953,0,0,232,232,464,464
SwitchRes: Monitor range 15734.00-15734.00,59.94-59.94,2.245,4.700,5.614,0.191,0.191,0.953,0,0,240,240,480,480
SwitchRes: \\.\DISPLAY1: AMD Radeon HD 6450 (PCI\VEN_1002&DEV_6779&SUBSYS_E204174B&REV_00)
Your mame.ini:
crt_range0 15734-15734, 59.94-59.94, 3,932, 4.700, 7.109, 0.191, 0.191, 0.953, 0, 0, 192, 223, 348, 446
crt_range1 15734-15734, 59.94-59.94, 3,932, 4.700, 7.109, 0.191, 0.191, 0.953, 0, 0, 224, 224, 448, 448
crt_range2 15734-15734, 59.94-59.94, 3.253, 4.700, 6.507, 0.191, 0.191, 0.953, 0, 0, 232, 232, 464, 464
crt_range3 15734-15734, 59.94-59.94, 2.245, 4.700, 5.614, 0.191, 0.191, 0.953, 0, 0, 240, 240, 480, 480
Seems avsp is reading the ranges from another ini?