Hand luggage rules on flights to Tbilisi - can you bring a backpack and a purse together?

On one flight backpacks weren't checked or weighed at all, but a woman's purse was specifically weighed — enforcement seems inconsistent.

With an allowance of 20 kg checked + 5 kg carry-on, a passenger who checked her suitcase still had a small backpack and a purse — at check-in she was told to either toss the purse or stuff it into the backpack.

On a flight from St. Petersburg, a passenger boarding with both a backpack and a separate handbag was told to merge them into one carry-on item or discard the extra bag.