Unless we can see the code that you wrote for the template we can't tell you where your error is. Here's an example of what I mean:
We had an issue 4 or 5 months ago with a free template that was being passed around off expertzz.com. It was created by a reputable individual and for the most part it worked great, looked amazing and was a huge hit. However, it had one small issue in it that made it unuseable. Specifically, in IE the DOB Calendar on Join/Edit pages would not work.
Now, normally we'd start checking the join.php, related inc/ files and even inc/js/ files. All of this was to no avail. We began to dig hard at the template but the join.css showed now hope of fixing it along with other associated script files. Finally, it was discovered, 2 lines in the templ_uni/css/general.css file, that had nothing to do with the calendar we're the entire reason. It used:
width: expression(100%-2px);
in reference to the top box design to create rounded corners. So how did that effect it? Not sure, but when we changed it to:
width: 100%-2px;
or
width: (100%-2px);
it all began to work pefectly and has on every example since. In the end, it took hours of digging through the code, replacing files one by one until we discovered the suspect file and then we had to go line by line to finally discover the exact issue. In your case, your dealing with the hello_member section of the site, while this is controlled by the general.css and anchor.css, we can't tell you without seeing the template and being able to play with it what the issue is.
This brings up the fact that someone will have to either have access to your server to do this or they will need a copy of the template files (provided this issue is in the template as suspected), upload them to a copy of Dolphin they have and then spend time tracking this issue down. This can be something that is completed in an hour or 2 or it could take weeks to track it down, depending on the coding skills of the individual working on it and where the problem lies. If the problem is with another mod you installed and not the template, or potentially a mod conflicting with the template then it can become an even bigger pain in the arse.
Unfortunately, I don't think many are going to be willing to jump into this for free as it has the potential to be a huge mess. Compare it to what happens when you bring home an 88 Honda that was in a fire and has been rewired and things are not working like the power windows, radio, window wipers come on in Reverse and go super fast in 3rd gear and so on. While the problems are obvious, the reasons for them can be a nightmare to track down.