By the BBCode editor do you mean the Rich Text editor?
Did you account for bbcode being used?
Yes in BB code editor mode BB codes are visible and therefore counted. RTE is opposite of BBCE.By the BBCode editor do you mean the Rich Text editor?
IIRC BBCodes are also counted in the character limit check.
Yes that admin page setting is set at 10K characters and post has around 7K character. Would like to understand the reason for this error before increasing the limit.Go into admincp >> Options >> messages and increase the field Maximum Message Length