ok let's try this:
BPM: 149.970 Offset: 14,520
BPM: 145.000 Offset: 147,344
BPM: 140.000 Offset: 148,999
BPM: 123.000 Offset: 150,718
BPM: 106.000 Offset: 152,689
BPM: 149.970 Offset: 154,948
That 149.970 BPM instead of 150 makes a huge difference.
Or you can copy this into the .osu instead (this is for Hard):
Also, delete the .osb file.
BPM: 149.970 Offset: 14,520
BPM: 145.000 Offset: 147,344
BPM: 140.000 Offset: 148,999
BPM: 123.000 Offset: 150,718
BPM: 106.000 Offset: 152,689
BPM: 149.970 Offset: 154,948
That 149.970 BPM instead of 150 makes a huge difference.
Or you can copy this into the .osu instead (this is for Hard):
SPOILER
[TimingPoints]
14520,400.080016003201,4,1,0,100,1,0
20020,-100,4,2,0,100,0,0
20720,-100,4,1,0,100,0,0
26820,-100,4,2,0,100,0,0
27020,-100,4,1,0,100,0,0
30520,-100,4,1,0,100,0,1
43320,-100,4,1,0,100,0,0
49720,-200,4,1,0,80,0,0
52620,-100,4,1,0,100,0,0
81620,-100,4,1,1,100,0,0
133620,-100,4,2,0,100,0,0
134320,-100,4,1,0,100,0,0
147344,413.793103448276,4,1,0,100,1,0
148999,428.571428571429,4,1,0,100,1,0
150718,487.80487804878,4,1,0,100,1,0
152689,566.038571428569,4,1,0,100,1,0
154948,400.080016003201,4,1,0,100,1,0
158140,-100,4,1,0,100,0,1
170940,-100,4,1,0,100,0,0
Also, delete the .osb file.