Exported primary contacts fields are not assigned (matched) correctly during import

Export PRIMARY contact fields to CSV. Import of this file does not assign automatically the fields correctly in "Match Fields (step 2 of 4)":

• fields not assigned: Individual Prefix, Individual Suffix,

• fields not available for assignment: Household Name, Location Type, On Hold, Legal Name, Group(s), Tag(s),

• Sic Code assigned as Internal Contact ID !

• Location Type assigned as Location Name !

• Supplemental Address 1 and Supplemental Address 2 assigned as Street Address !

• Geo Code 2 assigned as Geo Code 1 !

• there are 2 fields named County

• Phone Type assigned as Phone !

• Region

• Do Not Email assigned as Email !!

• Do Not Phone assigned as Phone !!

• Image URL assigned as IM Screen Name !

• No Bulk Mail (Opted-out) is not assigned at all

• exported birth date (format DD/MM/YY) does not import ("Invalid value for field(s) : Birth-Date") corrected by hand format to DD/MM/YYYY also does not import. perhaps it is expecting some other format (localisation not implemented in this place?).