Turning hotbar sharing on or off does not delete any bars. All classes and all jobs maintain their own version of each hotbar 1 through 10 and chotbar 1 through 8. Additionally, a separate set named "share" of each hotbar 1 through 10 and chotbar 1 through 8 exist. If you turn hotbar sharing for a hotbar 1 on, the class and job bars for hotbar 1 are not deleted; they are merely hidden as long as hotbar 1 is shared. In fact, they can still be referenced by macros that try to access "current 1" or the job abbreviation (e.g., "smn 1") even though what is visible is "share 1". Conversely, if hotbar 1 is not shared, the "share 1" bar still exists even though what is visible is "current 1" or "smn 1".
If you unshare the relevant bar numbers, the hidden class- and job- specific hotbars should reappear.