You are obviously using a line or column chart as you have set the
time-scale option. I have replicated your squashed up labels by
setting the units as days and the intervals as 7 and 1 days but I had
no trouble changing it back to months again. Make sure absolutely
every box reads Months on the Format Axis window and ensure that there
are no ticks in the boxes beside the base units, major unit and minor
unit settings. You should also remove the ticks beside the minimum and
maximum settings if you want to force them to the values you require.

Andrea Jones
www.stratatraining.co.uk