I disagree, nothing has been forgotten at all. The Taxman content is likely to be an ongoing storyline, that wont be finished with the next episode. So having it now or a bit later won't make any difference. No specific time was given for Anna going on further dates with the Taxman's client. But there was a clear implication that Jeff's date with Anna, would be sooner rather than later, and the current weekend is the obvious time for it to happen. In any case, Jeff is a popular character, the Taxman not so much so. Unsurprisingly, more popular characters always get priority over less popular characters. That's just the reality of games that rely on patrons. And you need to accept that, because without the patrons, we wouldn't be having this discussion at all.
There's a very good reason why Ashley is coming back into the game at this time. Ashley was in the game quite a lot during Chapter 1, because he was Andrew's friend (or at least that's what Andrew was supposed to believe). But with Andrew in a coma in hospital, there was much less reason for Anna (who has a love/hate relationship with Ashley) to have much to do with him, apart from taking part in his auction. But now that Andrew is out of hospital and recovering, he's hanging around with Ashley again, who is Andrew's sole 'friend' in Sun City. Of course, Ashley's true motivation for doing this, is to get closer to Anna.