Looking at that page I can see straight away that #sidebar is nested inside #left-column, compare that to one of your non BP pages e.g index.php or page.php and you’ll see the difference, always compare a non bp with a bp to see how the structure needs to run and obviously the BP pages must follow the structure of your themes WP files. #sidebar must come after you have closed the left-column as each is floated left and right respectively.
Looks like you’re missed adding another div and/or closed one too early. Post your page.php/index.php file at pastebin.com and post the URI generated here.
EDIT – hey hnla, didn’t see you there. i took too long a time to answer 
15 minutes to write a one line sentence 
hnla, you should see the other post where it took me 25+minutes
Open up your WP theme’s page.php with text editor.
Copy what’s in it and paste the code at http://pastebin.com and click on “submit” link.
That webpage will now have a new URI. Copy that URI and paste it here.
http://pastebin.com/XTajFDqr sorry bout that. That’s pretty cool!
No worries. And yeah, pastebin is cool
At top of activity/index.php, replace
`
`
with
`
`
At the bottom of that file, replace
`
`
with
`
`
In addition, you might like to change the header tag used in BP template files to match your theme’s. So for activity/index.php, change
`
`
to
`
`
Thats not looking like what I have in the code?? Im a cry 
lol
And did you read what I wrote and try adjusting according to my suggestion?
hnla here is my sidebar stuff from the css
‘ #left-col {width: 616px; float: left; padding: 28px 0 0 0; overflow:hidden }
#sidebar {float: right; width: 275px; color: #525252; padding: 1px 0 10px }
* html body #sidebar {margin-top:-1px } ‘
We’re not concerned with the applied styles but with the markup, is the #sidebar being flowed after the #left-col has closed?
@triznic have you tried to work on what I posted above?
get_sidebar appears in footer.php for the intrepidity theme https://themes.svn.wordpress.org/intrepidity/1.5.1/footer.php so following the structure of your theme onto the activity/index.php file, you don’t add any get_sidebar calls in the other BP template files
yeah I tried that but like I said it didnt look like what I had in there and there was still no change.
ok so it makes sense the footer sidebar thing. but how come I still get my sidebar in content area on bottom. I know this has to be something so easy but it is drivin me nuts. Once I get it I will never forget it but right now……grrrr
Now Ive really gone and shot the pooch!! Was trying to work on Registration problems and read in a forum to re-install BP now my pages say this…
Fatal error: Allowed memory size of 33554432 bytes exhausted (tried to allocate 77824 bytes) in /xxxx/xxx07/xxx/xxxxxx/dubgolf/wp-content/plugins/buddypress/bp-forums/bbpress/bb-includes/backpress/class.wp-taxonomy.php on line 664
