Here’s additional information:
1) Deactivated all plugins.
2) Reactivated 4 plugins: a) User Role Editor Pro; b) TablePress; c) EnviraGallery; and d) Yoast SEO.
3) Logged into local development site as Editor. Results:
Problems described in first post remain unchanged.
Conclusion: Issues described in first post a result of plugin configuration and operation.
Still need help in resolving issues.