Graph formatting issues

I run a query every day against a database to produce a text file I import into Excel (2003) as an aid in producing some reports. The graphs present viusally four of the columns of data against a date range, which is a fifth column of data. The last three days of query-running are shown. I just have a couple of formatting questions.
1) For reasons best known, I suppose, to Excel itself, the worksheet for April 24 chose not not provide my 'Target' data label for 13-May-14. On the April 25 refresh, 13-May is provided, but 12-May and 14-May are not. On the April 28 version, 12-May and 14-May are back, 13-May is missing again, and also 15-May. Any ideas why Excel is deciding not to present some of the data labels for this trendline, and why the data points he doesn't present vary from day to day?
2) On the April 24 graph, the 'Revised Target' data label for the 16-Jun-14 data point displays '99', although the value in the underlying data for that point is clearly '396'. On the April 25 graph, the mistaken data label has moved to the 17-Jun data label, and on the April 28 graph it has moved to the 18-Jun data point. Why is Excel deciding to display '99' instead of the given value for one of the data points (and why does it move around)?
3) As long as we're on the April 28 graph (I manually placed the data labels along the trendlines on the other two graphs), the data labels for 'Target' don't appear very close to the points they represent, and particularly, the label for the 12-May-14 data point has hopped way up above the 'Revised target' trendline. And the 'Revised Target' data label for 13-May-14 is slightly to the right of the data label for 14-May-14. Is there any way to get the data labels to appear right along the trendlines they represent?

For those who need to understand the data in order to evaluate better what's going on:
I provide reports to the development and testing teams in my shop to monitor progress of testing the changes for the next release of our main application. I run 17 queries against our development and testing database, and import the results into 11 worksheets which form the basis for the reports. This is one of the worksheets. The testers create test scenarios and load them into the system, and then PASS or FAIL them as they are tested. The column graph shows the number of scenarios passed as of each day, and the number not passed. Once the reporting is actually in the scheduled testing time period, the columns will stay. The area graph - Target - shows how many scenarios need to be passed each day at a consistent rate to get the testing done by the scheduled end of testing. For these graphs, since testing hasn't officially started yet, Target shows the number of scenarios loaded for each day before the testing 'starts'. The line graph - Revised Target - is intended to show how many scenarios need to be passed each day, given how many had been passed as of the day before reporting.

I reduced your font size to 8.4 and they all displayed.

Hmm... I tried that and the missing data labels stayed missing. I select one of the data labels in the series, which selects most of the labels, right-click and select Font... from the drop-down menu, and change the font size to 8.4. The font got smaller for all the labels in the series, but the missing labels didn't show up, even after saving and re-opening the file. Same if I use the font selector on the ribbon, and if I upgrade to Excel 2010. How did you accomplish this?
Thanks for taking a look at this.

Well, when I delete the data labels, and then re-add them, it puts in all the data points as I expect.

For the "Target" data series (the area chart), however, the labels were aligned halfway between the primary axis and the trendline. When I select the data labels, Format Data Labels, and select Alignment, I see that the default alignment is "Middle Centered". If I select Top, or Top Centered, the labels don't move.

For my line graph (Revised Target), the data labels all appeared, and the 99 was now displaying the correct value, and the labels lay along the trendline as I desire (oddly, the Alignment on those is also "Middle Centered"), but the labels are not aligned correctly above their corresponding primary axis values.

I suppose I could delete and re-add the data labels for those two series every day I prepare my reports, but it would be convenient not to have to adjust every data label manually every day. I suspect as well that tomorrow the 99 will come back, and some of the missing "Target" labels.

I can ask the users if they'd accept a line chart for that series; they do like the area chart and the overall format that I have.

And, shouldn't the area chart behave - or be able to be gotten to behave - the way I anticipate?

Ah, now that makes (some) sense. Thanks. I've used Excel a lot over the years but am fairly new to the charting functionality. I guess I figured that if Microsoft offers five label positions for an area chart, all five would actually be available. I can work with this. I'll add a line chart with labels, and make the line invisible (or the same color as the area chart).