Limits, results

[iceruam]

So I just got my handheld prime. I was doing some simple limit problems. My 50g gives the answer -(-4/7) but my prime gives me 355309/621820 in CAS mode, 4/7 in home mode. My windows version gives me 4/7 in CAS and home modes and my ti89 gives me 4/7 all radian mode.
Limit x -> 0 ((sin(-4x))/(-7x))

I changed the CAS settings (Page 2)to the same as the windows version (default)(25, 1, 100, 0.000000000001, 1E-15, 60)
now I get 471068/824515
I am assuming these settings are affecting it, what values should I be using in the CAS settings page 2? and no, I did not note the original setting on the handheld but I think I only changed Rec Eval and Newton
Or where else should I look?
Thanks