Excel Shape Problems

I went into shapes in Excel and created a rectangle.  When I drag the rectangle into the position I wish to have it the rectangle snaps back one or two cells and will not allow me to place the rectangle in the position I wish to have it.  Please let me know how to rectify this problems.  On this same spread sheet I have created numerous other rectangle shapes an have been able to drag them into position and have them remain where I put them.  

The only difference I can between the rectangular shape I am having problems with is that the alignment is not vertical or horizontal like all the other rectangular shapes that stayed in place.  The problematic rectangle which keeps snapping back is on about a 45 degree angle.

Please let me know how I can rectify this problem, thanks.

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