Flash mysteriously and partially disappears in ALL browsers – please kindly help if you have time!!

Question

Hello to all supportive and knowledgeable Flash developers around the  world!!
Please please please help me for this very  mysterious and strange problem!! I've tried to shorten the description  to minimum, but please kindly spend 5-10 min to have a read!! And offer  any insights...I am very desperate for some helps
Some backgrounds
I am  implementing a charting tool for my project, which is very similar to  Google’s finance chart but much more tailored-made to meet different  requirements. The charting interface is made up of the following core  components:
Time  selection panel: to change the time span of the chart
Measurement points panel: to select  different points of measurement
Chart area: to display the measurement data of the  selected measurement points over the selected time span
For example, the Apartment’s power administrator can view the  total power consumption in Unit 101 of Building A, in the Pacific  Apartment’s complex (a made-up name).
Similarly, the administrator can also “stack” up charts of  multiple measurement points, having an all-in-one view like below:
Only the chart is  implemented in Flash/AS3, the other panels are JSP, JavaScript and Dojo.
When an user clicks on a  measurement point to add a chart to the chart area, the following  things happen in order (briefly):
User clicks on a link (say,      Total  Amps)
Dojo event listener attached to the link picks up  the mouse click event
The  Dojo event listener calls an AS3 method (addChart) through the External  Interface to add a chart to the Flash chart:
The Flash chart picks up the method call,  adds a chart to the stage and reposition all charts on the stage. Since  the stage height is fixed at 600 pixels, each chart added will be  fitted into the 600 pixels. Eg, 1 chart on the stage = 600 px/chart, 2  charts = 300 px/chart, 3 charts = 200 px/chart…etc.Please let me know if you would like to see a picture before the flash chart is stretched!
Once a chart has been successfully added to the stage, Dojo  will stretch the <div> tag that the chart resides so that each  chart still “looks” like 400 pixels tall. For example, 3 charts on the  stage means each chart is 200 pixels tall, but Dojo will stretch the  entire <div> to 1200 pixels, making each chart look like 400  pixels
The above  step is the same concept as resizing the stage
The problem!!!!
When an user adds  more than 7 charts, the 8th chart will start have Flash  contents disappeared. To be exact, I used firebug to increment the  <div> height, and found that when height exceed 2924 (a magic  number) pixels, Flash contents start to disappear. See below (the  red-boxes indicate the missing contents)
The situation gets worse when continue to add charts,  eventually half of the bottom chart will disappear.
Some pre-work I have done:
I have unit tested this component in  standalone Flash movie, with 3 LCD monitors totalling 4000 pixels in  height. I produced 10 charts in a single flash movie, and then resized  the window from 600px to 4000px, no charts disappear. 
This happens in all of IE7, IE8, FF3+,  and Chrome. Although slightly different manifestation, but they all have  contents mysteriously disappeared.
This also happens to GOOGLE's finance chart, when  you enlarge the chart's <div> to over 10000 pxs (yet another magic  number)
The  funny thing is, however, when a graph has been cut in half, the visible  half is still operatable. For example, if the zoom window as been cut in  half, I can still move it, zoom in and zoom out.
Please allow  me to thank you heartfully, if you have finished reading all of the  above information. At this point of time, any useful  suggestions/solutions will be highly appreciated! Please help! THANK  YOU!

Answer 1

Hello to all who has, or are, reading this post:
Just a few things added to the "Some pre-work I have done":
I have read up this issue on "the Flash height problem" and have changed the parent <div> to also accommodate style:"height=100%". No, problem still persists.
I am using SWFObject 1.5 to insert the flash movie on the page and I have studied their issue/bug reports. I have not finished reading the list of bugs, but so far have not found any useful information. However, please kindly let me know if you know an issue with SWFObject making flash contents disappear.