The next buttons on my table elements are not working & form size

I have a form with two input tables.  The first one comes up fine and after I enter the information and try to hit the green next button, it won't go to my next form question.  If I navigate to my next form question with the dots at the bottom of the page, and then enter the information and try to hit the submit button, it just gets stuck saying please wait.  I never get to a submittal screen. 

Also, is there a way to specify the height of the form question box?

I have just tested your form and noticed it works fine, I also cloned your form and it seems to have worked too, you could take a look to my cloned form here: https://form.jotformpro.com/72138269349970 

Also, is there a way to specify the height of the form question box?

Unfortunately, it is not possible to increase the fields height using the new form builder layout, you may switch to the normal layout through the account settings: https://www.jotform.com/myaccount/settings 

Once you have switched to the normal layout, you could customize the fields with custom CSS codes, here is some code that you may use: 

.form-textbox{

    height: 10px;

}

This guide will help you injecting the code: https://www.jotform.com/help/117-How-to-Inject-Custom-CSS-Codes 

I hope this helps.