Have I correctly used ‘instead,’ ‘so as to,’ ‘their,’ and ‘ones’ in the given sentences?

Have I correctly used ‘instead,’ ‘so as to,’ ‘their,’ and ‘ones’ in the given sentences?

1. In her article, the news reporter withheld the victims’ real names and used fictitious names instead so as to protect their privacy.
2. The victims’ real names were changed into fictitious ones so as to protect their privacy.