I have several errors that occurs in both excel 2000 and excel 2003

the foundation
.. cells from b2 to g2 are formatted in green and with 2 digit number
formats with neg numbers in brackets. H2 is formatted in yellow and contains
the formula, and also the same number format.

problem #1.
in cell f2 for example, I will put in a number 150.00, then in cell
f3 the new number is 150.01. I then will highlight the two numbers and drag
down to say 148.00. The program will properly sequence the numbers up (or
down for that matter) in the two digit readout format properly. What really
takes the cake is in the formula box. The numbers are not consistantly in
whole integers. Sometimes I have whole integers, but on the whole I am
getting numbers that has anywhere from 9 to 12 zeros after with a 2 or a 7
attached to the end. eg. will be to see this number 150.00
151.0100000000002 151.020000000000002 and some attach a lot of 9's after.
Now when I highlight two cells of 149.00 and drag down the intergers are in
two decimal places .

Problem #2
I am doing a simple checkbook style program with two negative
entry columns for business , one column for being paid the day of service.
The second column for any transaction after that date, similar to accounts
receivables.. My twist on this was a math checker in the last column to
check our math, if the numbers are correct it will say "match".
The formula! In cell H2 enter
=if(g2+c2-d2-e2=f2,"match",g2+c2-d2-f2).

So, I enter the number 149.00 in cell e2, then 0 in f2, and 149 in g2 I get
"match". So, far so good. Now, I put in 149.00in e3, and .01 in f3 and
149.01 in g3 and I get a red (0.00). the next penny up will give me a
black (0.00)., and so on but some numbers for example such as 2.12, will give
me a "match" . I found that retyping the numbers that have long decimal
places such as 151.580000000002 to 151.58 will give me a (0.00). and
151.590000000002 into 151.59 will return "match".