[Dev-C++] getline crazyness

[<cg...@wo...>]

  Happy new year tewnty three (hurra for the Empire!)

I need make an operation over a huge amount of files, basically I 
fstream.getline(buffer, 255); and then I do whatever. The problem is in 
all the files one line is treated badly:

original:

3.429    145.1683002    5.4    0.908401    43.66
3.629    174.13    5.28    0.9093    42.86
3.859    175.61    5.14    0.909673    41.9
4.172    177.08    5.01    0.909293    40.8
4.649    178.56    4.91    0.908071    39.57

result: (I simply I original.getline(buffer, 255); result << buffer << endl;

3.429    145.1683002    5.4    0.908401    43.66
3.629    146.6423431    5.28    0.9093    42.86
671    -26.5866636    40.8   //WHY THIS HAPPENS??????????????????!!!!!! 
I'M ABOUT TO KILL MY COMPUTER!!!!!
4.649    151.707065    4.91    0.908071    39.57

These are a couple of lines from original which includes the conflicting 
line:, the previous one and a couple of the previous and the next. I 
don't see any conflicting value. I tried to onherit from fstream and 
write my own getline, so it will stop only with '\n' or end of buffer 
size, but I get the same error.

number of character    |  character
------------------------------------

54    6
10   

51    3
46    .
56    8
53    5
57    9
9       
49    1
55    7
53    5
46    .
54    6
49    1
9       
53    5
46    .
49    1
52    4
9       
48    0
46    .
57    9
48    0
57    9
54    6
55    7
51    3
9       
52    4
49    1
46    .
57    9
10   

52    4
46    .

I've made a count and it seems like getline doesn't recognize the 
newlines, and is filling the buffer till the 255 characters I specify as 
length limit, then it jumps about the number of characters per line to 
the next line, althought all the operations which are done in a 
line-per-line basis are done correctly for each line. I want substract a 
value for the second one each line, and all lines have the second value 
they need. I've tried increasing the size of the buffer and value passed 
to getline as delimiter, I doubled the size and then it makes the same 
error in the next line than before, then I double it again, but then 
there is no difference, the error doesn't run to the next line.
I tried to make it a UNIX kind of file (through an editor program with 
this ability) but the result is still the same. In getline I checked as 
delimiter for \n, \r, 10, 13 and 12, and nothing worked.

Here is the piece of code where the fail happens, when passing from the 
input file to the temporary one:

while(inFile.eof() == false){
inFile.getline(buffer, 5096);
first = buffer[0];
if (first == '/') //Some lines are commented with //, I want quit them.
point = &buffer[2]; //I know if ther first is / the second is the same.
else
point = buffer;
if (tempFile.is_open()) //Compiled with and without this line.
tempFile << point << endl; .
cout << point << endl;
}

But if in cout the lines are right, then getline is working fine, the 
error is in tempFile << point << endl...

I'll have to recode with plain C file functions (I've done it changing 
fstream.getline with fgets and fstream << with fprintf, now it works 
with other odd errors which at least don't invalidate the files, like 
printing lines more than once).
However remains the question, why can it happen?