I am using a fluid design to have two tables display next to each other in desktop & stack in gmail app. I used the following tutorial: https://www.campaignmonitor.com/blog/post/4240/creating-a-centred-responsive-design-without-media-queries?utm_content=buffer5974c&utm_medium=social&utm_source=twitter.com&utm_campaign=buffer

Here's the scoped email: https://litmus.com/scope/1sdzsugtbhf4

It works beautifually in most email clients, but litmus is showing desktop gmail & yahoo as stacking the boxes, not inline. To make matters more confusing, I have tested in multiple locations, multiple computers, and multiple browsers and my non-litmus tests always show the boxes as inline.

Is Litmus wrong? Customer Support doesn't think anything is wrong with their emulators and I believe them. What should I trust... Litmus or my own tests?