Various problems

1. Bleached spots on several paphiopedilums leaves.
Micranthum:


Malipoense:


Jackii:


2. Something eats the leaves on my Masd. decumana:





3. Masd. constricta has lots of small round black dots on the leaves:


It all started just recently.
All these orchids have two things in common:
a) they all live in the basement - a bit cooler environment, some sun very early in the morning;
b) they all were sprayed with Safers Endall miticide twice little while ago.
But there are over 10 more paphs and at least 3 more masdies with same two things and they are perfectly fine.

Any ideas? Should I throw those plants away?
Thanks.