Excel Chart Question
 

I have a line chart that has a glitch at one data point. The data series is
taken from a column of dollar amounts and the time series (x-axis) is taken
from a series of dates. The dates are entered as 1/1/2004, 2/1/2004,
3/1/2004, etc. On the chart, at the april 2004 date, there are two tick
marks. One is correct, and the other one is sitting directly above the first
one. All other data points are correct on the chart. If I remove the x-axis
labels, the erroneous tick mark disappears.

Here is what I see for the specifications:
=series(,'MED RX COMBINED'!$D$54:$D$81,'MED RX COMBINED'!$Y$54:$Y$81,1)

Thanks in advance for any enlightenment!

Judy Felfe