Bug With Multiple Youtube Videos Embed?

when i tried to include multiple videos in a single post i get misalignment issues.

http://smartjewelryshopper.com/ODBG/shapes/cushion/should-i-choose-a-broader-flash-or-pinfire-cushion-diamond/

[column width="six" position="first" ][youtube id="RjKh6urNEIc" width="420" height="315"][/column]

[column width="six" position="last" ][youtube id="ASL8nEa3bpA" width="420" height="315"][/column]

the code is for the above 2 videos.

In the video near the bottom, i used this

[column width="two" position="first" ]  [/column]

[column width="eight" position="" ][youtube id="9N0y-E-Xg1M" width="420" height="315"][/column]

[column width="two" position="last" ]  [/column]

THe end result is that the bottom video doesn’t align properly.

However, if i were to remove the first 2 videos, the 3rd video would work properly. Likewise, if i use the following code as the ONLY video in a post, i have no issues.

[column width="two" position="first" ]  [/column]

[column width="eight" position="" ][youtube id="9N0y-E-Xg1M" width="420" height="315"][/column]

[column width="two" position="last" ]  [/column]

could you look into this?