I glued up four 3/4" thick, 2" wide, 3' long birch boards. I used a biscuit joiner with #10 biscuits. I think I got a pretty good hang of ensuring the slots were cut evenly.
After I finished glueing, I noticed that the resulting 8" wide board had uneven surface due to slight misalignment of the 2" boards from which it was made, maybe not more than 1/16" of an inch, but it was obvious that it wasn't due to the different thicknesses of the boards, since in that case one side would be perfectly flat and the other not.
Anyway, since this is my first edge joining, I would like to ask the experienced guys, do you find this normal? If not, how do I ensure it doesn't happen? I neither have a jointer, nor a thickness planer, so I am limited to an old orbital sander to fix this problem.