No, that doesn't seem right or not usual anyway but if the meter reads 4 in 4 buffer and 7 in 7 buffer then it could be. RO membranes pass hydrogen ions so there is usually a slight downward shift in pH. Plus permeate is usually low enough in ions that the CO2 it dissolves from air is sufficient to overcome the slight buffering capacity of the water and lower the pH. Something around pH 6 might be more typical. OTOH if the feed is at high pH and loaded with alkalinity the permeate could be at higher pH.
What is the feed water like? What's it's pH and alkalinity?
[Edit] I guess I should also add that pH measurement in low ionic strength waters is difficult as pH measurement depends on the completion of an electrical circuit through the water and really pure water is not at all a good conductor. There are special techniques for doing it bight slow response and erratic readings can be expected if they aren't used.