Hi Celia Palacios,
Thanks for contacting us. Regarding your queries
1. Yes you can use the two different classes.
2. Here you have missed the row end part of columns shortcode that’s why it is not working. Correct shortcode is
[ebs_frame ... class="frm1"]
[ebs_lead align="center"]Content[/ebs_lead]
[ebs_row]
[ebs_column md="6" sm="12" xs="12" class="class1 class2"]
[ebs_sectionheading class=""]Content[/ebs_sectionheading]
More content that should be centered within the first column…
[ebs_thumbnail link="http://www.example.com" src="http://example.com/logo.png"]
More content in column 1…
[/ebs_column]
[ebs_column md="6" sm="12" xs="12" class="class1 class3"]
[ebs_sectionheading class=""]Content[/ebs_sectionheading]
More content that should be right aligned within the second column…
[ebs_thumbnail link="http://www.example.com" src="http://example.com/logo.png"]
More content in column 2…
[/ebs_column]
[/ebs_row]
[/ebs_frame]
Please feel free to contact us in case you still face issue.