Concatenation Issue?

I have a table called long_text that stores long descriptions used for different projects. It contains fields key1-8, (key1, key2 etc) whcih key1 is used to seperate and organize different descriptions and key2 is the primary key which holds the unique ID of the projects. Then there is 2 more fields one called line_number and one called line_text. line_text holds the actual descriptions and line_number is the sequential number of the line text. Line_text is set at varchar(4000).

The issue i am getting, is that in my report i made all the joins to get it to call the line_text field for a comments section on one of my reports. However, The report fails if the user is writing their comments more than 70 characters. Ive found what is happening is that if the comment is over 70 characters, the database creates a new record, keeps key1, key2 the same, adds one to line_number and then uses the next 70 characters of the comment in line_text. And will repeat the process untill the comment is over. So if say the comments section is 700 characters, i will end up with 10 records. And it looks something like this.

key1-pe_notes1 key2- 206598 line_number - 1 line_text - abcabcabc....
key1-pe_notes1 key2- 206598 line_number - 2 line_text - abcabcabc....

Here is the specific line of code to call teh commnets section

(select line_text from ip.structure q, ip.long_text l, ip.notes n where q.structure_code = n.structure_code and n.structure_code = l.key2 and l.key2 = pe.planning_code and key1 = 'PE_NOTES01') "Comments"

And its failing because im returning more than 1 record. Does anyone know any way around this.. I dotn really understand why its creating a new record and using line_number to sort it... esp when line_text can hold 4000 characters... Is there a way i can concatenate the other records where line_number is not 1? Any help much appreciated.