Is this how REX4 is supposed to look like?

Noticed something strange after installing REX 4 normal clouds in P3Dv3.3. It looks like a mix of normal and soft clouds:

I installed soft clouds just before, but normally, by installing another cloud set they're supposed to be overwritten or am I wrong??

EDIT: This seems to be set-specific if I'm not mistaken. I installed another one (no soft clouds) and it doesn't show these fluffy clouds.