Fix a few issues found during fine-tuning (#2582)

ming030890

2025-07-04 a750595594321833b48dc19798eed66876a100b4

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p m    p.m.
pm    p.m.
p.m.
p.m    p.m.
am    a.m.
a.m.
a.m    a.m.
a m    a.m.