I had a problem once I went over three tabs. This happened only when I was a database grid plugin which is intended to give information from the MySql database (used jDBExport extension) on a yearly basis. The service from the developer was enough to buy this extension because they simply kept at it until they found a work around and an understandable configuration.
I would recommend that on all occasions whenever you have a problem with this extension,no matter how small, you contact the developer.
The combination of both extensions makes an excellent outcomes for anyone trying to extract information from a MySql database.
A great extension and a great service!