Why would a IF THEN result jump up to a prior line in the VBA code

Without providing an example.  I can get it later if needed.  If I have a For Next loop and within the For Next Loop I have an IF THEN statement.  For some reason when the IF Statement runs it jumps back to a prior line of code above the Loop to another IF THEN statement.  What would be a reason for this to occur. Note if I Debug-Compile no errors are found.   Realize this question may be difficult to evaluate without an example but I am not home yet...

I was hoping the question was obvious enough without an example to offer some suggestions to troubleshoot.