I highly recommend deleting your /plugins/dynmap/markers.yml file. Otherwise old markers might still show up.
+ ADDED New settings to dynmap integration
# Set the maximum amount of chunks beeing processed at once for updating the land markers.
# These chunks aren't actual minecraft chunks. Just Lands chunks. So you don't need to worry about lag.
# This setting is especially for weaker hardware.
# NOTE: This setting requires server reload / restart.
max-chunks-per-round: 50000
# Set the spawn icon
# You can disable this by setting it to ''
spawn:
icon: 'greenflag'
# Set min zoom. The icon won't display if the zoom in the browser is smaller.
min-zoom: 5
# IMPROVED Dynmap config changes like color will now apply immediately after server restart