Please don't take offense to this question I'm about to ask, but are you absolutely sure you can do the probing safely?
The reason I am aking this is because most experienced snake keepers would have probably already known the snake was not a floridana, and was a splendida to begin with anyway.
See my blunt logic here..LOL!
Now if you are very familiar with other colubrids, and have sexed them many times before, please ignore my question, and accept my apology..

regards, ~Doug
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"a snake in the grass is a GOOD thing" 
my website -serpentinespecialties.webs.com