<span class="line">Even after created database characterset in utf-8 and collation in utf-8 general ci
keeps getting notices as
</span>
extension/myextension/design/ezflow/templates/zone/2zoneslayout1.tpl, utf-8
for each templates
Those messages are only "notices" not error nor warning messages. So you can ignore them. There are displayed because you enabled [TemplateSettings]/Debug in site.ini.