MuTect2 Output -- How can this be somatic mutation

n_lod      t_lod_fstar     t_lod_fstar__INFO__   n_genotype    n_ref_count n_alt_count
 50.33        PASS               16.43                         0/0                  448         149

n_allelic_depth     n_QSS     n_alt_allele_seen     i_n_REF_F1R2     i_n_REF_F2R1
      448,149           14273             False                          214                234

i_n_ALT_F1R2    i_n_ALT_F2R1     i_n_Foxog    n_tumor_f    t_genotype    t_ref_count
           0                        0                    NA            0.135              0/1            457
t_alt_count   t_allelic_depth    t_QSS     t_alt_allele_seen    i_t_REF_F1R2
       55                457,55       15045                  True                  223

i_t_REF_F2R1      i_t_ALT_F1R2    i_t_ALT_F2R1    i_t_Foxog      t_tumor_f
      234                             1                    4                   0.8            0.059

This is from out put from MuTect2, and I annotate it with Oncotator.
I pasted only the scores for the mutation. The names with "n" are for normal sample, the names with "t" are for tumor sample.
Strange things:
(1) How come the tumor fraction in normal sample is 0.135, even higher than that in tumor sample 0.059?
(2) n_alt_count is 149, but n_alt_allele_seen is false, and both i_n_ALT_F1R2 and i_n_ALT_F2R1 are 0.