Multiple gene names in output file

[alegiac95]

Hi,
apologies for bothering you again but I have a question about the results from SMultiXcan. The software ran flawlessy with the elastic net models and correcting for heritability, but when analyzing the results file I found that there are multiple rows with the same gene_name, but with different z_mean and pvalue. When running this on my results dataframe imported into R

results %>%
  count(gene_name) %>%
  filter(n > 1) 

I get these results:

 # A tibble: 4 × 2
  gene_name     n
  <chr>     <int>
1 LINC01115     2
2 LINC01422     2
3 LYNX1         2
4 SPATA13       2

If I then look at the individual genes (i.e., SPATA13) with this code

results %>% 
  filter(gene_name == "SPATA13") %>% 
  select(gene, gene_name, z_mean, pvalue)

obtain this:

# A tibble: 2 × 4
  gene               gene_name z_mean pvalue
  <chr>              <chr>      <dbl>  <dbl>
1 ENSG00000182957.15 SPATA13   -0.938  0.348
2 ENSG00000228741.2  SPATA13    0.125  0.870

Since I am no expert in the field, I wanted to ask whether this is to be expected or if it is a bug in the results or in the data.
If this is an expected, which of the gene copies do i select?