dumpdata syncdata does not copy tags for all models

[kkvero]

Thank you for a great tool!
I have:

App 1
  Model A
  Model B
App 2
  Model C

All models have tags.

After doing
local:

python manage.py dumpdata app1 > app1/fixtures/app1.json
python manage.py dumpdata app2 > app2/fixtures/app2.json
python manage.py dumpdata taggit > fixtures_other_apps/taggit.json

on server:

python manage.py syncdata app1.json
python manage.py syncdata app2.json
python manage.py syncdata fixtures_other_apps/taggit.json

In Django Admin I see all tags on Tag model.
Only Model A has its full set of tags.
Models B and C don't have any tags.

Am I doing this wrong?