Player changing jersey number

[Scrapper1]

This actually happened to me on Saturday, so I'd like feedback on whether we did the right thing. NCAAW rules.

The team has two players in libero jerseys, conveniently numbered #1 and #2. Libero #1 plays in the first set, and Libero #2 plays second set.

After the second set I overhear the coach tell regular player #10 to go change jerseys. When she comes back out, she is Libero #1. I didn't notice that she had played the second set as #10.

So now she wants to play the third set as #1. Since she started the match as #1, I allowed her to play as #1 and told the coach that she would not be allowed to change numbers going forward.

But should/could she have been sanctioned for playing after changing numbers in the previous set? Or should I not have allowed her to change back to #1, since I knew that she had been #10 in the second set?

Or is there something else I should've done? Any help appreciated.