I did a test with ACF 4 and it works correctly, with not other plugins installed and the default theme.
Some things to check that may cause an issue.
- All the field names are different
- All the field keys start with
field_
If there aren’t any problems there then you need to disable other plugins and possibly switch to a default theme to see if you can discover what might be incompatible. If you can figure out what might be causing the issue then we can possibly figure out why and maybe how to fix it.
