XnView Software

Hi )
I again in stupor ) why ? Why so ?
If I want use filter for smothing image , I can set diffirence filters in same program , but different places , what does not give add filters in both places ?

Thiss so and will leaved ? Or we recive unifed filters for risizer and viewer ?
Also , I want understand , what for in resizer avaiable cubic with low quality and not replaced to bicubic with better quality ) and what for in viewer absent lanczos2 mode and mitchel
please , make unifed modes in both varians