polyglot conspiracy

A recent post on Mr. Verb mentioned a construction that I have, but Mr. Verb had never heard before (though he’d heard it attested to):

Here’s an odd one, to my ear, but reliably reported from southern Wisconsin: also too, meaning it sounds like ‘in addition to this other one. The example sentence reported was (note: it was the example given, not mine):

She is married to a really great guy. But also too she’s having an affair with this other man.

This is really normal to me sentence-initially, and it got me thinking about using double lexical items, even when it would seem to suffice to use one. Now, the also too example is kind of interesting, because those are both adverbs by definition (there was also a dog; there was a dog, too), but in discourse they’re often used more like conjunctions, or at least in conjunction-like positions in that they connect two sentences/thoughts together(Also/and/but we could get dessert; We could also get dessert; Too, you should get dessert while you’re there; You should get dessert while you’re there, too). Hmm, I guess they’re still really adverbs - modifying the action - but in terms of the pragmatics, they’re acting like conjunctions, adding the new sentence’s information onto the old one’s.

However, I can *only* stack also and too when they’re sentence-initial, doing the conjunction thing; I can’t stack them when they’re in plain old post-verb adverbial position:

Also too, you should get dessert there.
Also/?too, you should get dessert there. [I don't use too here, but it doesn't sound especially strange.]
*You should also too get dessert there.
You should also/too get dessert there.
*You should get dessert there also too.
You should get dessert there also/too.
*You also too should get dessert there.
You also/?too should get dessert there. [this too sounds a little funny, but I presume for some people it's ok.]

However, I *can* use them both in the sentence, where also is doing the conjunction thing and one is doing the adverb thing:

Also you should get dessert there too.

I can even use also in both positions:

Also, you should also get dessert there.

I think all of this might be related to a phenomenon I blagged about a while back, sentence-initial introductory also. That is, I notice an awful lot of people using also where I might expect them to use conjunctions like and, but, or so; or, introductory adverbs [what is the English Grammar 101 name for these words?!!?! I can't remember.] like furthermore or additionally. Perhaps the also too construction is part of a larger trend where adverbs meaning “additionally” are getting used more and more to signal a new sentence with information relevant to a given sentence, rather than describing actions/things themselves as being somehow additional. Compare:

Also, I didn’t want him to know what I was thinking.

to

I also didn’t want him to know what I was thinking.

or

Also too, I thought he was going to tell me to buy plants.

to

I thought he was going to tell me to buy plants, too.

In other words, it’s acting more like a discourse marker than a lexical descriptor of any sort. Kind of like how like used to mean like…

Maybe not, though, I don’t know. Who else has “also too”? What about “and but” or “also but”? What about “no yeah”? What about “and so” or “so but”? I have all of these. Hell, I think I even have things like “but and so…” and “so but also…” I am a conjunction stacking machine!