Formatting Differences in Preview and Saved Page

1. Using Source Editor insert the following storage format into a page to test:

   <p><span style="color: rgb(128,0,0);"><strong>This is the 1st row of panels.</strong></span></p><ac:macro ac:name="section"><ac:rich-text-body><ac:macro ac:name="column"><ac:parameter ac:name="width">50%</ac:parameter><ac:rich-text-body><ac:macro ac:name="panel"><ac:parameter ac:name="bgColor">white</ac:parameter><ac:parameter ac:name="titleBGColor">#3893c0</ac:parameter><ac:parameter ac:name="title">Goal</ac:parameter><ac:parameter ac:name="borderStyle">solid</ac:parameter><ac:parameter ac:name="borderColor">#3893c0</ac:parameter><ac:parameter ac:name="titleColor">white</ac:parameter><ac:rich-text-body>
   <p><span style="color: rgb(0,51,102);">Test Goal Section.</span></p></ac:rich-text-body></ac:macro></ac:rich-text-body></ac:macro><ac:macro ac:name="column"><ac:parameter ac:name="width">50%</ac:parameter><ac:rich-text-body><ac:macro ac:name="panel"><ac:parameter ac:name="bgColor">white</ac:parameter><ac:parameter ac:name="titleBGColor">#3893c0</ac:parameter><ac:parameter ac:name="title">Goal</ac:parameter><ac:parameter ac:name="borderStyle">solid</ac:parameter><ac:parameter ac:name="borderColor">#3893c0</ac:parameter><ac:parameter ac:name="titleColor">white</ac:parameter><ac:rich-text-body>
   <p><span style="color: rgb(0,51,102);">Test Goal Section.</span></p></ac:rich-text-body></ac:macro></ac:rich-text-body></ac:macro></ac:rich-text-body></ac:macro>
   <p><strong><br /></strong></p>
   <p><span style="color: rgb(128,0,0);"><strong>This is the 2nd row of panels.</strong></span></p>
   <p>&nbsp;</p><ac:macro ac:name="section"><ac:rich-text-body><ac:macro ac:name="column"><ac:parameter ac:name="width">50%</ac:parameter><ac:rich-text-body><ac:macro ac:name="panel"><ac:parameter ac:name="bgColor">white</ac:parameter><ac:parameter ac:name="titleBGColor">#3893c0</ac:parameter><ac:parameter ac:name="title">Goal</ac:parameter><ac:parameter ac:name="borderStyle">solid</ac:parameter><ac:parameter ac:name="borderColor">#3893c0</ac:parameter><ac:parameter ac:name="titleColor">white</ac:parameter><ac:rich-text-body>
   <p><span style="color: rgb(0,51,102);">Test Goal Section.</span></p></ac:rich-text-body></ac:macro></ac:rich-text-body></ac:macro><ac:macro ac:name="column"><ac:parameter ac:name="width">50%</ac:parameter><ac:rich-text-body><ac:macro ac:name="panel"><ac:parameter ac:name="bgColor">white</ac:parameter><ac:parameter ac:name="titleBGColor">#3893c0</ac:parameter><ac:parameter ac:name="title">Goal</ac:parameter><ac:parameter ac:name="borderStyle">solid</ac:parameter><ac:parameter ac:name="borderColor">#3893c0</ac:parameter><ac:parameter ac:name="titleColor">white</ac:parameter><ac:rich-text-body>
   <p><span style="color: rgb(0,51,102);">Test Goal Section.</span></p></ac:rich-text-body></ac:macro></ac:rich-text-body></ac:macro></ac:rich-text-body></ac:macro>

2. in 5.2.3 preview page, appears like 2nd image attachment, all in one column. When you save it, appears in 2 separate columns.
3. in 5.2.5 and 5.3.1 as tested, appears in two columns both in preview and saved copy, as in 1st image attachment. Therefore I am not able to reproduce in versions more recent than 5.2.5.

Tested in both Firefox 25 and Google Chrome 30.0.1599.101 and confirmed.