It is unfortunate that you are feeling this way.
Let me give you a bit of background information. This will not solve the technical issue in the short term, but I feel I must react. I think being pleased or disappointed has a lot to do with expectations.
I feel your expectations are not in line with the context. 1st off: Tiki is a project not a product. There are no employees, only volunteers in a community. People here are scratching their own itch and choose to share back. All the people here are giving their time, and they don't owe you anything. Very much the way that you don't owe them anything. You are just as responsible as everyone else to solve this problem.
There are hundreds and hundreds of items on the wishlist at:
If you want a product or a service, and the associated quality of service agreement then, you should (and I am pleased that you are ready to) hire a consultant. I hope that you choose to go the extra mile and get the issues fixed and shared back to the project.
Who says this is a Tiki bug? It could very well be a Microsoft bug. Have you complained to Microsoft because the program is not working like it should?
About misleading claims:
It obviously works for some people. I regularly install Tiki with XAMMP and it works very well. This is a wiki project so please do update the documentation to what you feel it should be. It's no use to attract people to the project that will be unhappy. This is not a bait-and-switch strategy.
Tiki has more built-in features than any other open source Web application. This has benefits and challenges, one of which is the varying quality of features. Make sure not to turn on experimental features, like Search Engine Friendly URL. This feature is relatively new and may be causing issues for some people.
On a related note, I recently started a project: