UMLR — simpleTime package problems

We are experiencing problems with elements of simpleTime Package.
TimeExpression, Duration, TimeEvent and Observation owners are not defined. The only possible owner becomes Package.
If TimeConststraints or DurationConstraints are used in SequenceDiagram, these multiple small elements could be added just into nearest Package (second level owner of Interaction). In real world packages could contain hundreds of Classes with defined behaviors, so hundreds of TimeExpression, Duration, TimeEvent and Observation elements appears in the root of such package (together with thousands of events from MessageEnds).