I had to pay an extra $119 for baggage. WHAT DO YOU THINK ABOUT THIS?

I flew De!ta last week. Before my flight I saw a notice that they had changed their restrictions for baggage. I called but was not given a definitive answer so I packed 1 suitcase for checked luggage.

At check in they charged me $119 for excess weight, I wanted to put heavy items in my carry on but the woman said the heavy items were liquids and did not provide me with an option to check my carry on.

When I arrived in Miami, I realized the fee of $119 was for only 1 flight. They tried to charge it again for my connecting flights BUT informed me that my carry on bag could be checked so I then checked 2 items and redistributed the weight so both checked item were within the limits, no excess fee.

I feel it was an error made at the 1st check in and feel De!ta should reverse a charge because all 3 of my flights that day I had the same number of peices with the same totalweight. It was De!ta's error to not inform me I was entitled to 2 checked pieces for Int travel. Do you agree?
Additional Details
To be totally clear. I was entitled to 2 checked pieces. But the first attendent permitted me to check only 1 bag and billed me excess weight. At my second check in point I was allowed to check both peices (I moved some articles around so neither peice was overweight.)