Never mind @fahmidamti it looks like it is ok. The limitation of tags it is related to the UI (User Interface) so if you can use more than 5 it is ok. Excuse me for this!
PS: TimCliff answered me about this in the #help channel in Steemit.Chat. Looks like some UI, related to another editors accept more than 5 tags and so far, there is no problem by doing that. Any info go to the #help channel in Steemit.chat