Repeater dragging broken with <table align="left">

In our newsletter we use <table align="left" width="30%"> to create 3 columns (2 on mobile).
When we implemented this with a repeater, we are unable to change the order of the elements; the repeater buttons are placed in a single column, stacked vertically, while the actual repeater layouts are placed in rows as the design specified.

https://dl.dropboxusercontent.com/u/15506581/Screen%20Shot%202015-11-20%20at%2009.50.09.png

There are 2 layouts, they are practically identical, only the one is hidden on mobile.
Could the layouts be the source of the problem?

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