L.C.,
I'm learning, too, but I'll give you an explanation based on my understanding.
Scorpio and Leo are both part of what would be a fixed cross or square, including Taurus and Aquarius, as well. (If you draw lines connecting all these signs on a zodiac wheel, it will form a large cross or square - depending on how you draw the connecting lines). So from one side of the square to another -is a square.
These signs are "Fixed" signs.
Also, you can draw a square in Cardinal signs - Capricorn, Aries, Cancer, and Libra. OR you can draw a square in Mutable signs - Gemini, Virgo, Sagittarius, and Pisces.
So, yes, looking at it this way, the points between each side of the square will be "square" - although points opposing each other (Leo and Aquarius, for example) will be in opposition.
There is also what is known as an "out-of-sign" square (or other aspects).
An example of this would be planets at 29* Leo, and 1* Aries (2* past what would have been an exact square at 29* Taurus). Technically, these are within orb of what would be considered a square (90*from each other), but are out-of sign. Some astrologers use these, other's don't.
And, going back and reading what you said again - your original question, no, that is not what I meant to say. It is however, a perfect example of how this particular retrograde cycle is messing with my thought processes! I'm going to have to be extra careful and re-read everything before I answer. Even the first part of this post doesn't really answer your question, but I'll leave it in just in case there's anything useful in there. I seemed to have read Peacefrog's question with the understanding that he/she was asking about Leo and Scorpio vs. the sun and moon in their chart. That would really be impossible to answer without knowing the degrees.
So, in summation..... Yes, Leo and Scorpio will always be squared signs, BUT the planets within them will not always be - that depends on the degrees at which the planets are located.
:38:Okay, did I manage to salvage my response in any way,shape,or form?
freedomlover
P.S. Thanks for pointing that out, L.C.!