are these errors critical (for traffic security)

[jeninit742]

WARNING: 'link-mtu' is used inconsistently, local='link-mtu 1633', remote='link-mtu 1634'
WARNING: 'tun-mtu' is used inconsistently, local='tun-mtu 1532', remote='tun-mtu 1500'
WARNING: 'cipher' is present in local config but missing in remote config, local='cipher AES-256-CBC'
WARNING: 'comp-lzo' is present in remote config but missing in local config, remote='comp-lzo'

especially concerned about cipher missing in remote config... does this mean the VPN provider does not encrypt the traffic ?