Lightly defrost chicken in microwave to separate them

I had two pieces of chicken breast in a tupperware container in my freezer. I wanted to separate them and put one in the fridge below, so I put it in the microwave on defrost (fairly weak machine, and defrost was the second lowest setting) for about 30s.

When it came out, the thinnest edges of the chicken became bendable, but still stiff. The other parts of the pieces were still stuck together, cold, and rigid.

I separated the two pieces by hand (it actually took a bit of force to bend them, and rip them apart because the thin transparent skin layer and the fat bound the pieces together when freezing), I then put one piece back in the same container, back into the freezer, and the other piece in another container into the fridge below.

I just bought them today, and the best before date is not for another 5 days. Before freezing, I rinsed them under very cold water, and patted them down with some Bounty towels.

I've been told to never refreeze meat after defrosting in the microwave. Is this still safe to eat or am I just being paranoid?