Problem with České Dráhy In Karta application

Problem with České Dráhy In Karta application.

Update:
České Dráhy application - Muj Vlak, already had several updates and these issues solved already.

Recently I and my wife decided to Visit Kroměříž, because it got amazing Flower Garden and Chateau Garden, I extremely recommend you to visit, maybe I will have post about it too.

Anyway, here is problem which I had to face. 
I purchased 3 tickets, for me, my wife and our friend, departure time 12:50PM. These was return tickets, as we planned to go there via bus (RegioJet). You can see down below that ticket information, it had 2 transfers.

But after we finished walking in the Flower Garden, we had decided to change tickets, so we will have more time, in order to visit Chateau Garden and the castle itself.

So, I chose the option "change" and replaced it with different departure time, 2:37PM. But this time it had 1 transfer. Strange thing was that after change, in my ticket list I can see extra 2 fields; 1 shows ticket is not valid (well, logical) and 1 shows  time/details of new ticket (also logical). 

Meantime I can still see first ticket (above screenshot), it already got confused. 

Anyway we got to train and ticket validator/inspector (not sure what is the proper name of this position) came to us and asked for tickets. I showed barcode of new ticket (departure time 2:37PM). Well, she said it is only "seat reservation". And we talked 5-6 minutes..., well because my Czech is not so good, yet :).

At the end I had to show her 1st ticket, which I cancelled and then she said "Všechno je v pořádku."

You might ask why I am sharing it, well I was calm and confident I already "know" how ticketing system works in ČD. But seems it got some "bugs". Or maybe I didn't understood something from beginning. But still any of you could face this issue and as foreigner we all can agree that due language lack it is not so nice have "this" after nice trip/travel. And also we could end up paying on stop, which is twice expensive almost.

Thank you for reading my story.