-suh vs -shuh

The differences between Munster Irish and the other dialects is whacking me on the head again. I ended up listening to the Pimsleur CD in the car yesterday (you don't realize how rare this is - I work from home and drive my car maybe 20 miles a week) and re-listened to the lesson on 'here" and "there" -- at the most basic, 'anseo' and 'ansin'

Well, pronunciation rules (and pronunciation in Connacht and Ulster) , rule that an 's' next to a slender vowel (e, i) is pronounced like English 'sh' in shop. Thus, uhn-shuh and uhn-shin. Tne 'an' part tends to get swallowed a bit, almost like n'shuh, n'shin.

The Pimsleur cds introduce the sounds as 'suh' and 'sun'. Anseo is 'un-suh' and ansin is 'un-sun'. Huh? I'm nothing near a fluent speaker (heck, I'm still struggling with the basics), but sounds wrong wrong wrong to my ear. It isn't, of course, it's just a dialectal difference, but I find myself snapping, "No! un-SHUH!" at the car speakers. The first time I heard it, I wasn't honestly sure that it was even the same word!

I haven't hit the lesson where here-and-there are introduced in Rosetta Stone, so no anseo/ansin yet, but they have introduced 'cad é seo? - what is this?' -- pronounced as I initially learned - 'shuh' or 'shaw'. I assume that they will continue with that. Rosetta is quite a bit closer to the 'standard', of course, so I guess that's expected.