Width of responsive project

Hello, I am Jinny

I am a instructional designer using captivate 8 to make e-learning source

At the moment, I am really struggle with the width of responsive project layout.

By accident (wrong short cut or something), mobile and tablet layout has been swapped and I cannot drag the breakpoints and change the width.

Because, there are two breakpoints for tablet, the mobile width cannot be smaller than 450.

So, on the bar, it is like Primary, Mobile and Tablet from the left which is supposed to be Primary, Tablet and Mobile.

Please help me to sort out this problem.

I will looking forward to hearing from you soon

Thank you for your help

Many Thanks

Jinny