tracker not showing my recent post

Well, this could be a drupal.org issue, better than a Drupal one, but it doesnt look like a bug.
Tracker is working with nodes and comments, only these project's issue follow-ups are not exactly comments so I dont really know how it is suppossed to work.

This is a known behaviour (well I hope so), I spend some time understand the way it works.
As you said Jose, follow-ups in project are not listed in tracker, because tracker is only aimed for node and comment. In fact if you write an issue, it will end up in you tracker, but reply to an issue won't.
IMHO it's a strange behaviour, but I'm not sure if anyone is modifying this.

So to keep up with your follow-ups in issues, you can subscribe to issues in : project/issues/subscribe, there select "own issues" and you will receive a mail each time someone reply to an issue where you posted a follow-up.

The trick I gave you is to track the issues where you posted in.
To track somebody issue (as you would do subscribing a thread in a forum), well, for the moment, nothing exists at Drupal.org. The subsribe module will allow you to do the job (I just don't experiment it with project module...) but it's not available here.
The Google Summer of code intented to create a new own that will be applied here.
See Subscriptions module for core.

Could this be a Project module issue? I, too, think it would be nice if comments to issues were taken into account by the tracker. The subscription trick could be a workaround, but it does not make the tracker work as expected.

This would be best solved I guess by letting Project module use Drupal's node comments instead of its own commenting/follow-ups. Is this pending a comments API patch?

I'm sure there's an issue for this somewhere, but I can't find it. There's a related post on Project using core uploads instead of its own attachments... but thats not it.

This might have been it.

This issue is a duplicate of http://drupal.org/node/13221