Scalability – The first thing that most people don't realize is that the average blog design template is not made for all businesses. If you need a massive template that has lots of advertising space and widgets, you might not find options. Now, if you find a good overall template, and you install it, you might not be able to scale it to fit your needs. Some designers make templates so that you can't change code or different areas.
Hidden Areas – Technology professionals are interesting people. They often times write code that has many hidden areas, so that you can tell it's their code. The idea of signature style coding is something that runs rampant amongst technology professionals, and when you buy a design template from one of these narcissistic type of coders, you'll see it in the way your code is layered throughout the different pages.
Code Structures – The next big thing to look into is the way the code is written. You'll find that many blogs require php and html, but some pages are written in either out dated code, or code that is vulnerable to breaks. You will see that there is not only proper code, but also breakaway code that is made, causing major problems for those that are unfamiliar with troubleshooting.
The above 3 problems with blog design templates is something that many people don't really understand. When you're just trying to promote your business, you'll find that getting a professional design is important, but just keep your eyes open for problematic areas that can mire the process of promotional consideration.