"Los dados mandan Escalera doble" is simply Salvador Garcia Soto's sign-off phrase. He ends all his articles with this, plus a little phrase such as "La semana promete" here. Here's another example; there are lots online:

"Los dados mandan Escalera doble. Semana redonda." (8 July 2018)
http://elcentronoticias.com.mx/2018/07/08/pan-el-mensaje-de-...

"Los dados mandan Escalera doble. Bueno el tiro." (20 April 2017)
http://www.primerahora.com.mx/index.php?n=190631&voto=n

Occasionally he varies it. But here's one from a few years ago that throws a bit of light on what it means (his regular readers will get the point):

"Los dados agradecen todas las muestras de apoyo y felicitaciones a su trabajo. Escalera doble para los lectores y amigos." (5 November 2015)
https://diariolavozdelsureste.com/2015/11/serpientes-y-escal...

So "los dados" is the journalist himself, and "Escalera doble" is a greeting or wish. I'm sure it must mean the very best of luck, because a double ladder in snakes and ladders (where ladders, of course, get you ahead in the game) must mean one ladder closely followed by another.

If you throw a 6 (at least by the rules I know) you get another throw, so if you throw a 6 and it lands you at the foot of a ladder, you go up to the top, and then if your second throw lands you at the foot of another ladder, you go up that one too, so you've gone up two ladders in one turn: a double ladder. At least, I bet that's what it means.

You can't really translate this, unfortunately, but maybe people will understand maybe the version I've suggested. Otherwise, you could simply put the message, as I understand it.


--------------------------------------------------
Note added at 1 hr (2018-08-24 18:21:48 GMT)
--------------------------------------------------

I think the capital letter is simply because "Escalera doble" is a kind of greeting or wish, just as he might have written "El autor les desea Feliz Navidad".

--------------------------------------------------
Note added at 15 hrs (2018-08-25 08:41:22 GMT)
--------------------------------------------------

If you decide to go with the more literal approach, I think the best chance of making it comprehensible might be something like this, for example:

A "Double Ladder" to all of you from "the Dice".

I'm still not completely convinced this would work, but using capitals and inverted commas would signal that the nouns have a special meaning, which readers might well be able to guess.

--------------------------------------------------
Note added at 19 hrs (2018-08-25 12:07:46 GMT)
--------------------------------------------------

Chema's comment in the discussion area has made me look into this a bit more thoroughly, and as I say in my response there, I think "los dados" doesn't refer to Soto himself after all, but to luck or fate. I still find a little odd that he should say "los dados agradecen las muestras de apoyo", in that case, and I don't know exactly what he means by it, but when he says in one such comment, which I quoted, that "los dados [...] regalaron una escalera doble", he can't be using "los dados" to refer to himself.

It's also true, as I said there, that he sometimes puts "Los dados muestran Serpiente doble", instead of "Escalera doble". So I think Chema must be right and that this phrase must be a comment on the week's events (I think his column is weekly). So it means "The dice have given us a Double ladder (or snake) this week". Or more straightforwardly: "It's been a good/bad week", or perhaps "The fates have smiled/frowned on us this week" (or even "The dice have been kind/unkind (to us)"). Or Chema's "lucky/unlucky roll of the dice".