two variants nearly detected in NGS, a challenge!

Question

[MiladAD]

Hi all

how can we interpret this?

two variants nearly detected in NGS (20 bps distance), in the reads which covers both of them we have: 20 % of reads have both variants 40 % of reads have only first variant 40 % of reads have only second variant

do you know what exactly happened which have made this result?

[Pierre Lindenbaum]

show us the IGV screenshot