I confirm behaviour with strong signals on edge of spectrum - mirror appears on other side. Observed several times (mostly with wide spread digital signals). It didn't bother me since it`s not the only Xiegu strong signal filtering problem I observed. In AM band (especially after sunset) I receive strong 1530 tuning to 510, strong 1593 tuning to 531 etc, ie receiving 3x freq. But `3x freq scale` is opposite: from right to left - 3x waterfall traces are moving in opposite direction then real 1x when tuning up/down.