Delete Cells With Repeating Values

working on grouping coordinates because he we wants to simplify data. But he works manually and it eats his time. He has some sheets with data. I suppose there are 7 sheets. Each sheet has coordinates shown on example below. Also there are intervals between pairs of columns, so there will be column A with B, interval of two columns C & D, column E & F and interval of two columns G & H and so on (altogether about 10 columns of coordinates per sheet). Every coordinate begins with argument '1' and increasing gradually by 1 (it is column A). Second column shows values of arguments. But some are repeating, some not. I would like to double these coordinates, where in one argument is only one value (for example these are row 1. and 11.). If there are two the same values I would keep them. But if there will be more values than two, for example row 5. - 8., I would delete row 6. and 7. from the middle. But border coordinates should be kept (row 5. and 8.) and split by moving up lower coordinate to it with rest coordinates. But I want do it separately for every two columns which contains these coordinates, so if I delete coordinates from columns A and B and split boundary coordinates I don't want do it for columns E&F, I&J...

Examle:

Before:
A B
1. 1 1
2. 2 2
3. 3 2
4. 4 2
5. 5 3
6. 6 3
7. 7 3
8. 8 3
9. 9 4
10. 10 4
11. 11 5
12. 12 6
13. 13 6
14. 14 6
15. 15 7
16. 16 7
.. .. ..

After:
A B
1. 1 1
2. 1 1
3. 2 2
4. 4 2
5. 5 3
6. 8 3
7. 9 4
8. 10 4
9. 11 5
10. 11 5
11. 12 6
12. 14 6
13. 15 7
14. 16 7
.. .. ..