Navigating with protected worksheet.

[Danl8619]

OK, so this is really puzzling me. I have only cells K1:AF1 locked and my worksheet protected. As expected, I cannot select these cells but I can select all the other cells. The problem occurs with navigating the worksheet, anytime I hit the enter key, the up key, or the down key; I end up in somewhere in row 1 instead of the cell below. However, I can navigate left and right just fine with tab and the right and left arrows. This is driving me crazy, so any hints as to why this is happenign would really help.

Thanks.