Hi! and welcome!
if that's the same as the 'dog-leg' when cutting strips, i was taught to place a square ruler along the edge of the fold and then line up my 5" by 22" along side of it. then cut.
it's worked well for me!
this site shows the layout of the rulers - in case you're visual like me!
http://www.scrapquilts.com/rotary_cut_strips.html