I'm new to the scene but would say yes. I actually ended up doing the rule of 4 feedings and bumping up so I've never had to feed 2. However I just posted a thread saying I've gone from XL mice to rats. I think some of the rats I have are not much if any bigger than the XL mice. I may have to feed 2 like you are now until I move up a size.
Buy yourself a scale that weighs in grams from walmart and that will give you an idea of how much you should be feeding you snake. Your going to want to offer 10-15% of the animals body weight ever 5-7 days.
I bought a digital scale at wallymart for $20. I use a .99c shoebox ontop of the scale to get my 0 reading first. Drop the mouse or rat in, then mark it in my book to whatever snake I feed.
I have it like this
date food (size and animal) Pee'd Poo'd Shed Weight (then I just go down the list on the page to what I did that day to whatever snake)
- - - Updated - - -
yes, bump to rats
0.1 2011 Albino (early) "Snakey Gurl"
0.1 2002 Normal "Crystal"
0.1 2007 Normal "Ellie"
0.1 2012 Normal (late) "Stardust"
0.1 2012 Spider (early) "Pixie"
0.1 2011 Het Pied (late) "Apple"
0.1 20XX Normal (??) "Marilyn"
0.1 20XX Normal (??) "Caroline"
1.0 2011 Het Pied (early) "Mudd"
1.0 2011 Enchi (late) "Batman"
1.0 2011 Normal possible het ghost (early) "Snakey Boy"
1.0 2011 Het Albino (early) "Alby"
1.0 2011 Het Red Axanthics (late) "Sabre Tooth"
1.0 2009 Normal "Buju"