the beatmap you linked in your description has correct timing, your cut didnt change timing from what I can tell.
offset of the first line should be 302, then just resnap the metronome reset to the blue line and delete the 3rd red line
replace timing section[TimingPoints]
276,319.148936170213,3,1,0,100,1,0
276,-111.111111111111,4,2,1,50,0,0
15621,-100,4,2,1,60,0,0
30940,-200,4,2,1,40,0,0
31011,319.148936170213,3,1,0,100,1,0
31011,-200,4,2,1,40,0,0
46316,-166.666666666667,4,2,1,45,0,0
53975,-142.857142857143,4,2,1,50,0,0
61635,-125,4,2,1,55,0,0
76968,-90.9090909090909,4,2,1,65,0,1
107606,-100,4,2,1,60,0,0
109587,-100,4,2,1,60,0,0
113351,-133.333333333333,4,2,1,60,0,0
122925,-133.333333333333,4,2,1,55,0,0
138245,-117.647058823529,4,2,1,55,0,0
153550,-90.9090909090909,4,2,1,65,0,0
153576,319.148936170213,3,1,0,100,1,0
153576,-90.9090909090909,4,2,1,65,0,1
184214,-100,4,2,1,60,0,0
199520,-100,4,2,1,5,0,0
199600,-100,4,2,1,60,0,0
same green lines work for both diffs from what I can tell they dont seem very different.