Thanks for your post - so you're referring to 2 things in your post:
1. The settings of the major axis - the information that's displayed on the axes of a Gantt chart can be customised via the respective nodes in Page Designer. So for that particular example, the Time Scale of the major axis is 'Month' - which is why you're seeing the values of October and January. In your own charts, you can set that Time Scale to suit your own requirements.
2. The tooltip labels - I'll need to investigate this further, and will update the thread with my findings.