Roots/growth/moisture

[Piper23]

A few weeks ago I received a suggestion that the pots my orchids were in might be too big. I re-potted in a smaller pot. When I did the roots didn't look so great so I treated with Kelpak following recommendations before re-potting. Since then it continues to not do well (losing leaves) and the roots appear in picture 1.

The second picture shows how all of my orchids are potted- it seems like airflow should be good. However, two weeks after giving the orchids a good water, the periphery of the potting media is dry but the bark at the core is still wet.

Suggestions for each problem?

New England, southwest facing windows, room temperature 68-70.