The hacked templates, nice though they are, have several shortcomings.
- You can't load them using the "Pick New Template" wizard in Templates.
- When you do load them, you may lose your custom widgets.
- Blogger doesn't support them.
Since Blogger doesn't support the third party products, when Blogger makes changes, it's doubtful that they test any changes against blogs that use them. And the Bloggers using them will occasionally experience problems.
In one case, the problem was related to the server hosting the blog components; the template in question was apparently a victim of its popularity, which caused the creators bandwidth limits to be exceeded. There have been other issues with other templates, in the past. Sometimes, the creators have simply stopped hosting some templates.
Blogger Help Group is an open forum. Anybody can post there, who wishes to do so. Helpers who post within the rules can continue to post there, can gather posting history, and can seem reliable by their history. It's their advice, but it's your blog, and you are responsible for your blog.