Conditional formatting: adding rows adds additional conditions; how to avoid that?

Hello!

I am attaching the file and two screen shots, otherwise it will be hard to explain.

In the tab called TASKS I have a set of conditional formatting rules, which initially extend from row 12 till row 42 (different columns for different rules).

I hoped that adding a new row would extend the conditional formatting row range to 12 - 43, because one more row is added. It turns out not to be true.

For example, if I want to insert a row between tasks 1.9 and 1.10, I do the following (in each case the formatting result is the same):

1) copy 1.10
click Insert copied cells
get 1.10 on row 22 now
the number of tasks is now 12 with the last one 1.12 (initially the last one was 1.11)

2) add a new row between 1.9 and 1.10
copy entire 1.9 (or 1.10) row
paste copied row into a newly created one

In both cases the result is the same. New conditional formatting rules are added (for the row 22), and the range of application of all initial rules is also changed - it is "split" now into a few ranges (see screen shot).

How can I add rows and only extend the existing condition rules, without splitting the initial range and without getting new conditional rules?

Thank you very much!