Partial Sync

[rackunits]

After setting up the mailsync app, and connecting it to my database, I have about 3000 records to sync. However, after syncing only 300 are available at mailchimp.
The logs shows these errors:

INFO:root:Users prepared: 100
ERROR:root:'utf8' codec can't decode byte 0xeb in position 5: invalid continuation byte
INFO:root:list_id: 6e276a1754, header_row: (u'EMAIL', u'FNAME'), columns: {u'EMAIL': u'email', u'FNAME': u'name'}
INFO:root:Users prepared: 100
ERROR:root:'utf8' codec can't decode byte 0xf6 in position 2: invalid start byte
INFO:root:list_id: 6e276a1754, header_row: (u'EMAIL', u'FNAME'), columns: {u'EMAIL': u'email', u'FNAME': u'name'}
INFO:root:Users prepared: 100
ERROR:root:'utf8' codec can't decode byte 0xf3 in position 6: unexpected end of data
INFO:root:list_id: 6e276a1754, header_row: (u'EMAIL', u'FNAME'), columns: {u'EMAIL': u'email', u'FNAME': u'name'}
INFO:root:Users prepared: 100
ERROR:root:'utf8' codec can't decode byte 0xe2 in position 2: invalid continuation byte
INFO:root:list_id: 6e276a1754, header_row: (u'EMAIL', u'FNAME'), columns: {u'EMAIL': u'email', u'FNAME': u'name'}
INFO:root:Users prepared: 100
ERROR:root:'utf8' codec can't decode byte 0xe9 in position 3: invalid continuation byte
INFO:root:list_id: 6e276a1754, header_row: (u'EMAIL', u'FNAME'), columns: {u'EMAIL': u'email', u'FNAME': u'name'}
INFO:root:Users prepared: 100
ERROR:root:'utf8' codec can't decode byte 0xe9 in position 9: invalid continuation byte
INFO:root:list_id: 6e276a1754, header_row: (u'EMAIL', u'FNAME'), columns: {u'EMAIL': u'email', u'FNAME': u'name'}
INFO:root:Users prepared: 100
ERROR:root:'utf8' codec can't decode byte 0xeb in position 5: invalid continuation byte
INFO:root:list_id: 6e276a1754, header_row: (u'EMAIL', u'FNAME'), columns: {u'EMAIL': u'email', u'FNAME': u'name'}
INFO:root:Users prepared: 100
ERROR:root:'utf8' codec can't decode byte 0xe9 in position 3: invalid continuation byte
INFO:root:list_id: 6e276a1754, header_row: (u'EMAIL', u'FNAME'), columns: {u'EMAIL': u'email', u'FNAME': u'name'}
INFO:root:Users prepared: 88
ERROR:root:'utf8' codec can't decode byte 0xe9 in position 2: invalid continuation byte

My config:

{
"web_app": {
"host":"http://development.my.local",
"port":4321
},
"timezone": "Europe/London",
"rows": "3",
"database": {
"decode": {
"skip": "false",
"ignore": "false",
"replace": "false",
"encoding": "utf-8"
},
"encode": {
"skip": "false",
"encoding": "utf-8"
}
}
}

[rackunits]

ping....