Pedal line error: 1.cannot cross tuplets; 2.pedal activated without the pedal line

Musescore 2.0 on Win 8.1 64bit
1. Create two tuplets within one measure
2. Drag a pedal line to the first note, and you see that the line stretch all the way to the end of the measure.
3.Move the end of the pedal line using double click, shift + left arrow, to the second note(which is in the first tuplet).
4.Now try to move back. Problem 1:Now the end of the line is unable to cross the tuplet.

PS. Attachment is my work. the pedal line with Problem 1 is in the second measure. Problem 2 is in the third measure, but I don't know how it happened.
PS.Click Inspector, and change the color of the element AND the line. But only the line color is changed. This problem is reported in #51526.