PTMW inconsistent processing of substitutions and breaks

In PTMW a normal schedule is overwritten with a substitution in the time data part of the screen. When you enter (overwrite) a substitution with the same working times as the original schedule the break is not applied. If you overwrite the schedule with a substitution with a different starttime then the break does appear.

We do not want the break to show up. Where do we solve this issue. In the BADI PT_BLP_USER? In time evaluation?

We have SAP 4.6c with support package C1.

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Problem in detail

If you overwrite the regular working schedule there are a few

scenarios, which seem inconsistent to us:

1. The working schedule (23:00 - 7:00) is overwritten with a

substitution (23:00 - 7:00), so new working times are the same: the

break disappears. Why? The break (03:00 - 04:00) should be applied.

2. The working schedule (23:00 - 7:00) is overwritten with a

substitution (14:00 - 22:00) which has working times that end before

the original working schedule would start, the break (03:00 - 04:00) is

applied, while working times are outside the breaking time.

3. The working schedule (23:00 - 7:00) is overwritten with a

substitution (21:00 - 05:00), which has working times that begin before

the original working schedule would start, the break (03:00 - 04:00) is

applied.

What we do not understand is that if you do not change working times

with a substitution the breaks disappears completely (case 1) but if

you change it a little bit (case 3) breaks are applied? In both cases

the break is within the time of the substitution, why then a different

reaction?

Secondly if a break is outside substitution times the break is still

copied (case 2) while a break within working times of a substitution

(case 1) disappears. It seems to be inconsistent.